Which countries have thermonuclear weapons?
Test No. 6
Test No. 6 is the codename for China's first test of a three-staged thermonuclear device and, also its sixth nuclear weapons test. The device was detonated at Lop Nur Test Base, or often dubbed as Lop Nur Nuclear Weapon Test Base, in Malan, Xinjiang, on 17 June 1967. With successful testing of this three-stage thermonuclear device, China became the fourth country to have successfully developed a thermonuclear weapon after the United States, Soviet Union and the United Kingdom. It was dropped from a Hong-6 (Chinese manufactured Tu-16) and was parachute-retarded for an airburst at 2960 meters. The bomb was a three-stage device with a boosted U-235 primary and U-238 pusher. The yield was 3.3 megatons.
Nuclear warfare
After World War II, nuclear weapons were also developed by the Soviet Union (1949), the United Kingdom (1952), France (1960), and the People's Republic of China (1964), which contributed to the state of conflict and extreme tension that became known as the Cold War. In 1974, India, and in 1998, Pakistan, two countries that were openly hostile toward each other, developed nuclear weapons. Israel (1960s) and North Korea (2006) are also thought to have developed stocks of nuclear weapons, though it is not known how many. The Israeli government has never admitted or denied to having nuclear weapons, although it is known to have constructed the reactor and reprocessing plant necessary for building nuclear weapons. South Africa also manufactured several complete nuclear weapons in the 1980s, but subsequently became the first country to voluntarily destroy their domestically made weapons stocks and abandon further production (1990s). Nuclear weapons have been detonated on over 2,000 occasions for testing purposes and demonstrations.
Reactor-grade plutonium
As of April 2012, there were thirty-one countries that have civil nuclear power plants, of which nine have nuclear weapons, and almost every nuclear weapons state began producing weapons first instead of commercial nuclear power plants. The re-purposing of civilian nuclear industries for military purposes would be a breach of the Non-proliferation treaty.
Nuclear weapons and the United Kingdom
The United Kingdom is one of the five nuclear-weapon states legally recognised as such under the Treaty on the Non-Proliferation of Nuclear Weapons (NPT). , nine countries have nuclear weapons. After the UK government announced its plans to refurbish its Trident missiles and build new submarines to carry them, it published a white paper on "The Future of the United Kingdom's Nuclear Deterrent", in which it stated that the renewal is fully compatible with the United Kingdom's treaty commitments and international law. At the start of the House of Commons debate to authorise the replacement of Trident, Margaret Beckett, the Secretary of State for Foreign and Commonwealth Affairs, stated:
Thermonuclear weapon
In 1999 a reporter for the "San Jose Mercury News" reported that the U.S. W88 nuclear warhead, a small MIRVed warhead used on the Trident II SLBM, had a prolate (egg or watermelon shaped) "primary" (code-named "Komodo") and a spherical "secondary" (code-named "Cursa") inside a specially shaped radiation case (known as the "peanut" for its shape).
List of states with nuclear weapons
North Korea was a party to the Nuclear Non-Proliferation Treaty, but announced a withdrawal on January 10, 2003, after the United States accused it of having a secret uranium enrichment program and cut off energy assistance under the 1994 Agreed Framework. In February 2005, North Korea claimed to possess functional nuclear weapons, though their lack of a test at the time led many experts to doubt the claim. In October 2006, North Korea stated that, in response to growing intimidation by the United States, it would conduct a nuclear test to confirm its nuclear status. North Korea reported a successful nuclear test on October 9, 2006 (see 2006 North Korean nuclear test). Most U.S. intelligence officials believed that the test was probably only partially successful with a yield of less than a kiloton. North Korea conducted a second, higher yield test on 25 May 2009 (see 2009 North Korean nuclear test) and a third test with still higher yield on 12 February 2013 (see 2013 North Korean nuclear test). North Korea claimed to have conducted its first hydrogen-bomb test on 5 January 2016, though measurements of seismic disturbances indicate that the detonation was not consistent with a hydrogen bomb. On 3 September 2017, North Korea detonated a device which caused a magnitude 6.1 tremor, consistent with a low-powered thermonuclear detonation; NORSAR estimates the yield at 250 kilotons of TNT. In 2018, North Korea announced a halt in nuclear weapons tests and made a conditional commitment to denuclearisation of the Korean Peninsula.
Common Security and Defence Policy
Six EU states host nuclear weapons: France and the United Kingdom each have their own nuclear programmes, while Belgium, Germany, Italy and the Netherlands host US nuclear weapons as part of NATO's nuclear sharing policy. Combined, the EU possesses 525 warheads, and hosts between 90 and 130 US warheads. Italy hosts 70-90 B61 nuclear bombs, while Germany, Belgium, and the Netherlands 10-20 each one. The EU has the third largest arsenal of nuclear weapons, after the United States and Russia.
Nuclear espionage
In a 1999 report of the United States House of Representatives Select Committee on U.S. National Security and Military/Commercial Concerns with the People's Republic of China, chaired by Rep. Christopher Cox (known as the Cox Report), it was revealed that U.S. security agencies believed that there is an ongoing nuclear espionage by the People's Republic of China (PRC) at U.S. nuclear weapons design laboratories, especially Los Alamos National Laboratory, Lawrence Livermore National Laboratory, Oak Ridge National Laboratory, and Sandia National Laboratories. According to the report, the PRC had "stolen classified information on all of the United States' most advanced thermonuclear warheads" since the 1970s, including the design of advanced miniaturized thermonuclear warheads (which can be used on MIRV weapons), the neutron bomb, and "weapons codes" which allow for computer simulations of nuclear testing (and allow the PRC to advance their weapon development without testing themselves). The United States was apparently unaware of this until 1995.
Bulletin of the Atomic Scientists
Although the arms race and the Cold War, which were focuses of the "Bulletin" for many of the earlier years, are no longer occurring, the publication still focuses on the nuclear dangers that exist in the world today. As more countries such as Pakistan and India have tested nuclear weapons, the "Bulletin" has focused on the dangers posed by these countries. The "Bulletin's" bi-monthly "Nuclear Notebook" is written by Federation of American Scientists experts Hans Kristensen and Matt Korda and tracks the number of nuclear weapons in the world by country. Robert "Stan" Norris, who was a founding co-author of the Nuclear Notebook, retired from the Notebook in 2018, although he is still a senior fellow at FAS. In 2015, the "Bulletin" added the Nuclear Notebook Interactive, an infographic that illustrates which countries have nuclear weapons and when they got them, and how many nuclear warheads they have in any given year. All nine nuclear-armed states are featured: the United States, Russia, China, India, Pakistan, France, Britain, Israel, and North Korea.
Treaty on the Non-Proliferation of Nuclear Weapons
Israel has a long-standing policy of deliberate ambiguity with regards to its nuclear program (see List of countries with nuclear weapons). Israel has been developing nuclear technology at its Dimona site in the Negev since 1958, and some nonproliferation analysts estimate that Israel may have stockpiled between 100 and 200 warheads using reprocessed plutonium. The position on the NPT is explained in terms of "Israeli exceptionality", a term coined by Professor Gerald M. Steinberg, in reference to the perception that the country's small size, overall vulnerability, as well as the history of deep hostility and large-scale attacks by neighboring states, require a deterrent capability.
British Armed Forces
The United Kingdom is one of five recognised nuclear weapon states under the Non-Proliferation Treaty and maintains an independent nuclear deterrent, currently consisting of four ballistic missile submarines, UGM-133 Trident II submarine-launched ballistic missiles, and 160 operational thermonuclear warheads. This is known as Trident in both public and political discourse (with nomenclature taken after the UGM-133 Trident II ballistic missile). Trident is operated by the Royal Navy Submarine Service, charged with delivering a 'Continuous At-Sea Deterrent' (CASD) capability, whereby one of the "Vanguard"-class strategic submarines is always on patrol. According to the British Government, since the introduction of Polaris (Tridents predecessor) in the 1960s, from April 1969 "the Royal Navy’s ballistic missile boats have not missed a single day on patrol", giving what the Defence Council described in 1980 as a deterrent "effectively invulnerable to pre-emptive attack". As of 2015, it has been British Government policy for the "Vanguard"-class strategic submarines to carry no more than 40 nuclear warheads, delivered by eight UGM-133 Trident II ballistic missiles. In contrast with the other recognised nuclear weapon states, the United Kingdom operates only a submarine-based delivery system, having decommissioned its tactical WE.177 free-fall bombs in 1998.
Treaty on the Non-Proliferation of Nuclear Weapons
Four states—India, Israel, Pakistan, and South Sudan—have never signed the treaty. India and Pakistan have publicly disclosed their nuclear weapon programs, and Israel has a long-standing policy of deliberate ambiguity with regards to its nuclear program (see List of states with nuclear weapons).
Nuclear energy policy
Following the March 2011 Fukushima I nuclear accidents, China, Germany, Switzerland, Israel, Malaysia, Thailand, United Kingdom, and the Philippines are reviewing their nuclear power programs. Indonesia and Vietnam still plan to build nuclear power plants. Thirty-one countries operate nuclear power stations, and there are a considerable number of new reactors being built in China, South Korea, India, and Russia. As of June 2011, countries such as Australia, Austria, Denmark, Greece, Ireland, Latvia, Lichtenstein, Luxembourg, Malta, Portugal, Israel, Malaysia, and Norway have no nuclear power stations and remain opposed to nuclear power.
Francophobia
Post-World War II France is a major world power with nuclear armed forces retaining a weapons stockpile of around 300 operational nuclear warheads, making it the third-largest in the world, greater than those of United Kingdom, modern Germany or postwar Japan – all nations which have rarely been claimed to be merely "middle powers". France also has a permanent seat on the United Nations, and one of the largest economies in the World. It is very active in international affairs in locations overseas (such as its continuing participation in Afghanistan, its Pacific nuclear testing in the 1980s, and in interventions in its former African colonies).
Nuclear warfare
The former chair of the United Nations disarmament committee stated that there are more than 16,000 strategic and tactical nuclear weapons ready for deployment and another 14,000 in storage, with the U.S. having nearly 7,000 ready for use and 3,000 in storage, and Russia having about 8,500 ready for use and 11,000 in storage. In addition, China is thought to possess about 400 nuclear weapons, Britain about 200, France about 350, India about 80–100, and Pakistan 100–110. North Korea is confirmed as having nuclear weapons, though it is not known how many, with most estimates between 1 and 10. Israel is also widely believed to possess usable nuclear weapons. NATO has stationed about 480 American nuclear weapons in Belgium, the Netherlands, Italy, Germany, and Turkey, and several other nations are thought to be in pursuit of an arsenal of their own.
New Agenda Coalition
1. We, the Ministers for Foreign Affairs of Brazil, Egypt, Ireland, Mexico, New Zealand, Slovenia, South Africa and Sweden have considered the continued threat to humanity represented by the perspective of the indefinite possession of nuclear weapons by the nuclear-weapon states as well as by those three nuclear-weapons-capable states that have not acceded to the Non-Proliferation Treaty, and the attendant possibility of use or threat of use of nuclear weapons. The seriousness of this predicament has been further underscored by the recent nuclear tests conducted by India and Pakistan.
World War III
Of the three nuclear powers in NATO (France, the United Kingdom and the United States), only the United States has provided weapons for nuclear sharing. , Belgium, Germany, Italy, the Netherlands and Turkey are still hosting US nuclear weapons as part of NATO's nuclear sharing policy. Canada hosted weapons until 1984, and Greece until 2001. The United Kingdom also received US tactical nuclear weapons such as nuclear artillery and Lance missiles until 1992, despite the UK being a nuclear weapons state in its own right; these were mainly deployed in Germany.
Treaty on the Non-Proliferation of Nuclear Weapons
On 24 April 2014, it was announced that the nation of the Marshall Islands has brought suit in The Hague against the United States, the former Soviet Union, the United Kingdom, France, China, India, Pakistan, North Korea and Israel seeking to have the disarmament provisions of the NNPT enforced.
Nuclear weapon
Since the atomic bombings of Hiroshima and Nagasaki, nuclear weapons have been detonated over two thousand times for testing and demonstration. Only a few nations possess such weapons or are suspected of seeking them. The only countries known to have detonated nuclear weapons—and acknowledge possessing them—are (chronologically by date of first test) the United States, the Soviet Union (succeeded as a nuclear power by Russia), the United Kingdom, France, China, India, Pakistan, and North Korea. Israel is believed to possess nuclear weapons, though, in a policy of deliberate ambiguity, it does not acknowledge having them. Germany, Italy, Turkey, Belgium and the Netherlands are nuclear weapons sharing states. South Africa is the only country to have independently developed and then renounced and dismantled its nuclear weapons.
Thermonuclear weapon
It is well established that Edward Teller advised and guided the Israeli establishment on general nuclear matters for some twenty years. Between 1964 and 1967, Teller made six visits to Israel where he lectured at the Tel Aviv University on general topics in theoretical physics. It took him a year to convince the CIA about Israel's capability and finally in 1976, Carl Duckett of the CIA testified to the U.S. Congress, after receiving credible information from an "American scientist" (Teller), on Israel's nuclear capability. During the 1990s, Teller eventually confirmed speculations in the media that it was during his visits in the 1960s that he concluded that Israel was in possession of nuclear weapons. After he conveyed the matter to the higher level of the U.S. government, Teller reportedly said: "They [Israel] have it, and they were clever enough to trust their research and not to test, they know that to test would get them into trouble."
Nuclear arms race
France became the fourth nation to possess nuclear weapons on February 13, 1960, when the atomic bomb "Gerboise Bleue" was detonated in Algeria, then still a French colony [Formally a part of the Metropolitan France.] France began making plans for a nuclear-weapons program shortly after the Second World War, but the program did not actually begin until the late 1950s. Eight years later, France conducted its first thermonuclear test above Fangatuafa Atoll. It had a yield of 2.6 megatons. This bomb significantly contaminated the atoll with radiation for six years, making it off-limits to humans. During the Cold War, the French nuclear deterrent was centered around the Force de frappe, a nuclear triad consisting of Dassault Mirage IV bombers carrying such nuclear weapons as the AN-22 gravity bomb and the ASMP stand-off attack missile, Pluton and Hades ballistic missiles, and the Redoutable class submarine armed with strategic nuclear missiles.
List of states with nuclear weapons
France tested its first nuclear weapon in 1960 ("Gerboise Bleue"), based mostly on its own research. It was motivated by the Suez Crisis diplomatic tension "vis-à-vis" both the Soviet Union and the Free World allies United States and United Kingdom. It was also relevant to retain great power status, alongside the United Kingdom, during the post-colonial Cold War (see: Force de frappe). France tested its first hydrogen bomb in 1968 ("Opération Canopus"). After the Cold War, France has disarmed 175 warheads with the reduction and modernization of its arsenal that has now evolved to a dual system based on submarine-launched ballistic missiles (SLBMs) and medium-range air-to-surface missiles (Rafale fighter-bombers). However new nuclear weapons are in development and reformed nuclear squadrons were trained during Enduring Freedom operations in Afghanistan. France signed the Nuclear Non-Proliferation Treaty in 1992. In January 2006, President Jacques Chirac stated a terrorist act or the use of weapons of mass destruction against France would result in a nuclear counterattack. In February 2015, President Francois Hollande stressed the need for a nuclear deterrent in "a dangerous world". He also detailed the French deterrent as "less than 300" nuclear warheads, three sets of 16 submarine-launched ballistic missiles and 54 medium-range air-to-surface missiles" and urged other states to show similar transparency.
Brazil and weapons of mass destruction
Brazil is one of many countries (and one of the last) to forswear nuclear weapons under the terms of the Non-Proliferation Treaty but possesses some of the key technologies needed to produce nuclear weapons.
Nuclear terrorism
According to Rolf Mowatt-Larssen, a former investigator with the CIA and the US Department of Energy, there is "a greater possibility of a nuclear meltdown in Pakistan than anywhere else in the world. The region has more violent extremists than any other, the country is unstable, and its arsenal of nuclear weapons is expanding." In 2015, White House press secretary Josh Earnest said that the US has confidence that Pakistan is "well aware of the range of potential threats to its nuclear arsenal". He added that the US is "confident that Pakistan has a professional and dedicated security force that understands the importance and the high priority that the world places on nuclear security".
Nuclear escalation
NATO, is an alliance of nations that via three permanent members (USA, UK, and France) is a nuclear alliance. This alliance was formed in order to provide a blanket of security for Western European nations, Canada, and the United States against the Soviet Union. NATO members get the safety of Nuclear weapons being shared to its members from one of the 3 permanent members. However, the U.S. was the primary defender of the other countries upon NATO's formation, due to its vast nuclear arsenal that it lays at the disposal for the organization. NATO's escalation policies did not take hold until the late 1950s. During the previous time the weapons and capabilities of NATO's combined members alongside the U. S's vast nuclear arsenal were enough to keep their citizenry calm. NATO policy would amalgamate from the U. S's initial nuclear strength. Russia lacked ICBM's or long range missiles to directly threaten the U.S. In contrast, the U.S. had stationed bombers within NATO countries in Europe that could deliver nuclear payloads to designated targets within the Soviet Union if they attempted to start a war. One of these was the U.S. Corporal missile with a range of 120 kilometers (70–80 miles) and had a one kiloton warhead. After the late 1950s the USSR was able to raise its Nuclear arsenal and delivery methods to have the U.S become a capable target. Many of the European NATO countries became worried that the US's massive firepower was equaled by the USSR and that the United States would have no reason to come to European aid with the new possibility of any attack from the U.S being met in kind with similar or greater means of nuclear arms directed at the U.S. created NATO's response of ‘Massive Retaliation’.
Nuclear weapons debate
In contrast, various American government officials, including Henry Kissinger, George Shultz, Sam Nunn, and William Perry. who were in office during the Cold War period, are now advocating the elimination of nuclear weapons in the belief that the doctrine of mutual Soviet-American deterrence is obsolete, and that reliance on nuclear weapons for deterrence is becoming increasingly hazardous and decreasingly effective in the post cold war era A 2011 article in "The Economist" argues along similar lines, that risks are more acute in rivalries between relatively new nuclear states that lack the "security safeguards" developed by America and the Soviet Union and that additional risks are posed by the emergence of pariah states, such as North Korea (possibly soon to be joined by Iran), armed with nuclear weapons as well as the declared ambition of terrorists to steal, buy or build a nuclear device.
Mainland invasion of the United States
Several modern-day armies operate nuclear weapons with ranges in the thousands of kilometers. The U.S. is therefore vulnerable to nuclear attack by powers such as the United Kingdom, Russia, China, and France. However, the UK and France are both members of NATO and so an attack on the U.S. by either of these states is very unlikely.
Thermonuclear weapon
President François Hollande announced 180 billion euros would be used from the annual defense budget to improve the country's nuclear deterrence. France contains 13 International Monitoring System facilities that monitor for nuclear explosive activity on Earth through the use of seismic, infrasound, and hydroacoustic monitors.
List of states with nuclear weapons
There are eight sovereign states that have successfully detonated nuclear weapons. Five are considered to be nuclear-weapon states (NWS) under the terms of the Treaty on the Non-Proliferation of Nuclear Weapons (NPT). In order of acquisition of nuclear weapons these are: the United States, Russia (the successor state to the Soviet Union), the United Kingdom, France, and China.
Weapon of mass destruction
The only country to have used a nuclear weapon in war is the United States, which dropped two atomic bombs on the Japanese cities of Hiroshima and Nagasaki during World War II. There are eight countries that have declared they possess nuclear weapons and are known to have tested a nuclear weapon, only five of which are members of the NPT. The eight are China, France, India, North Korea, Pakistan, Russia, the United Kingdom, and the United States.
Samson Option
Nevertheless, as early as 1976, the CIA believed that Israel possessed 10 to 20 nuclear weapons. By 2002, it was estimated that the number had increased to between 75 and 200 thermonuclear weapons, each in the multiple-megaton range. Kenneth S. Brower has estimated as many as 400 nuclear weapons. These can be launched from land, sea and air. This gives Israel a second strike option even if much of the country is destroyed.
Treaty on the Non-Proliferation of Nuclear Weapons
At the time the NPT was proposed, there were predictions of 25–30 nuclear weapon states within 20 years. Instead, over forty years later, five states are not parties to the NPT, and they include the only four additional states believed to possess nuclear weapons. Several additional measures have been adopted to strengthen the NPT and the broader nuclear nonproliferation regime and make it difficult for states to acquire the capability to produce nuclear weapons, including the export controls of the Nuclear Suppliers Group and the enhanced verification measures of the International Atomic Energy Agency (IAEA) Additional Protocol.
Nuclear Terrorism Convention
The Nuclear Terrorism Convention (formally, the International Convention for the Suppression of Acts of Nuclear Terrorism) is a 2005 United Nations treaty designed to criminalize acts of nuclear terrorism and to promote police and judicial cooperation to prevent, investigate and punish those acts. As of September 2018, the convention has 115 signatories and 114 state parties, including the nuclear powers China, France, India, Russia, the United Kingdom, and the United States. Most recently, Benin ratified the convention on 2 November 2017.
Nuclear weapon
Only one country—South Africa—has ever fully renounced nuclear weapons they had independently developed. The former Soviet republics of Belarus, Kazakhstan, and Ukraine returned Soviet nuclear arms stationed in their countries to Russia after the collapse of the USSR.
Nuclear weapons of the United States
The United States is one of the five recognized nuclear powers by the signatories of the Treaty on the Non-Proliferation of Nuclear Weapons (NPT). As of 2017, the US has an estimated 4,018 nuclear weapons in either deployment or storage. This figure compares to a peak of 31,225 total warheads in 1967 and 22,217 in 1989, and does not include "several thousand" warheads that have been retired and scheduled for dismantlement. The Pantex Plant near Amarillo, Texas, is the only location in the United States where weapons from the aging nuclear arsenal can be refurbished or dismantled.
British hydrogen bomb programme
The successful nuclear test of a British atomic bomb in Operation Hurricane in October 1952 represented an extraordinary scientific and technological achievement. Britain became the world's third nuclear power, reaffirming the country's status as a great power, but hopes that the United States would be sufficiently impressed to restore the nuclear Special Relationship were soon dashed. In November 1952, the United States conducted the first successful test of a true thermonuclear device or hydrogen bomb. Britain was therefore still several years behind in nuclear weapons technology. The Defence Policy Committee, chaired by Churchill and consisting of the senior Cabinet members, considered the political and strategic implications in June 1954, and concluded that "we must maintain and strengthen our position as a world power so that Her Majesty's Government can exercise a powerful influence in the counsels of the world." In July 1954, Cabinet agreed to proceed with the development of thermonuclear weapons.
Nuclear escalation
European nations had the potential to become Nuclear battlefields. If a war between superpowers were to break out, even if not originating in Europe, would quickly engulf it. The possibility of Warsaw pact nations under the USSR attacking Western Europe ensured all possible conflicts of nuclear escalation. It would escalate from conventional warfare to the use of tactical Nuclear weapons and then the possibility of going further and using intermediate nuclear weapons existed. The existence of nuclear weapons such as the U.S. Corporal missile, Redstone missile, Sergeant, and a missile called the Davy Crockett that was so small it could be fired by one man from the back of a jeep. These weapons given to Europe from the U.S. made it evident that if a nuclear war were to occur, it would almost surely engulf Europe as well. Strong ties, culturally, economic, and political tie the U.S with many European nations and the umbrella of NATO not only offered protection for these European countries, but also put them within the USSR's attack possibilities in a nuclear war.
List of states with nuclear weapons
In July 2005, U.S. President George W. Bush and Indian Prime Minister Manmohan Singh announced plans to conclude an Indo-US civilian nuclear agreement. This came to fruition through a series of steps that included India's announced plan to separate its civil and military nuclear programs in March 2006, the passage of the India–United States Civil Nuclear Agreement by the U.S. Congress in December 2006, the conclusion of a U.S.–India nuclear cooperation agreement in July 2007, approval by the IAEA of an India-specific safeguards agreement, agreement by the Nuclear Suppliers Group to a waiver of export restrictions for India, approval by the U.S. Congress and culminating in the signature of U.S.–India agreement for civil nuclear cooperation in October 2008. The U.S. State Department said it made it "very clear that we will not recognize India as a nuclear-weapon state". The United States is bound by the Hyde Act with India and may cease all cooperation with India if India detonates a nuclear explosive device. The US had further said it is not its intention to assist India in the design, construction or operation of sensitive nuclear technologies through the transfer of dual-use items. In establishing an exemption for India, the Nuclear Suppliers Group reserved the right to consult on any future issues which might trouble it. As of December 2017, India was estimated to have a stockpile of around 130 warheads.
Nuclear famine
Much of the speculative research on nuclear war-induced climate change to date focuses on a hypothetical, large-scale nuclear exchange between modern day Russia and the United States. However, the post-Cold War world also includes a number of other nuclear-armed countries — such as India, Pakistan, and North Korea — that are currently engaged in de facto or frozen armed conflicts with their neighbors. In comparison to "global" nuclear war, a regional conflict between nations with relatively small nuclear arsenals would likely produce less dramatic climate effects. Nonetheless, it has been argued that global cooling resulting from such a conflict could have large-scale impacts on agriculture and food supply systems worldwide.
Anti-nuclear movement
Today, some 26,000 nuclear weapons remain in the arsenals of the nine nuclear powers, with thousands on hair-trigger alert. Although U.S., Russian, and British nuclear arsenals are shrinking in size, those in the four Asian nuclear nations—China, India, Pakistan, and North Korea—are growing, in large part because of tensions among them. This Asian arms race also has possibilities of bringing Japan into the nuclear club.
During Barack Obama's successful U.S. presidential election campaign, he advocated the abolition of nuclear weapons. Since his election he has reiterated this goal in several major policy addresses. In 2010, the Obama administration negotiated a new weapons accord with Russia for a reduction of the maximum number of deployed nuclear weapons on each side from 2,200 to between 1,500 and 1,675—a reduction of some 30 percent. In addition, President Obama has committed $15 billion over the next five years to improving the safety of the nuclear weapons stockpile.
Nuclear weapons and the United Kingdom
A month after Britain's first atomic weapons test, America tested the first thermonuclear (hydrogen) bomb. The Soviets responded with Joe 4, a boosted fission weapon, in 1953. Penney believed that Britain could not afford to develop a hydrogen bomb. Henry Tizard believed that the nation should focus on conventional forces instead of duplicating the nuclear capabilities of the American forces that were already defended Britain and Europe: "We are a great nation, but if we continue to behave like a Great Power we shall soon cease to be a great nation. Let us take warning from the fate of the Great Powers of the past and not burst ourselves with pride."
Israel and weapons of mass destruction
Israel is widely believed to possess weapons of mass destruction, and to be one of four nuclear-armed countries not recognized as a Nuclear Weapons State by the Non-Proliferation Treaty (NPT). The US Congress Office of Technology Assessment has recorded Israel as a country generally reported as having undeclared chemical warfare capabilities, and an offensive biological warfare program. Officially, Israel neither confirms nor denies possessing nuclear weapons.
Tactical nuclear weapon
Ten NATO member countries have advanced a confidence-building plan for NATO and Russia that could lead to treaties to reduce the tactical nuclear weapons in Europe.
High-alert nuclear weapon
Virtually all "high-alert nuclear weapons" are possessed by the U.S. and Russia. Both nations use automated command and control systems in conjunction with their early warning radar and/or satellites to facilitate the rapid launch of their land-based intercontinental ballistic missiles (ICBMs) and some submarine-launched ballistic missiles (SLBMs). Fear of a "disarming" nuclear first-strike that would destroy their command and control systems and nuclear forces led both nations to develop "launch-on-warning" capability, which requires high-alert nuclear weapons able to launch on a 30-minute (or less) tactical warning, the nominal flight time of ICBMs traveling between the U.S. and Russia.
Anti-nuclear movement
Thirty-one countries operate nuclear power plants. Nine nations possess nuclear weapons:
List of states with nuclear weapons
The Soviet Union tested its first nuclear weapon ("RDS-1") in 1949. This crash project was developed partially with information obtained via espionage during and after World War II. The Soviet Union was the second nation to have developed and tested a nuclear weapon. The direct motivation for Soviet weapons development was to achieve a balance of power during the Cold War. It tested its first megaton-range hydrogen bomb ("RDS-37") in 1955. The Soviet Union also tested the most powerful explosive ever detonated by humans, ("Tsar Bomba"), with a theoretical yield of 100 megatons, intentionally reduced to 50 when detonated. After its dissolution in 1991, the Soviet weapons entered officially into the possession of the Russian Federation. The Soviet nuclear arsenal contained some 45,000 warheads at its peak (in 1986); the Soviet Union built about 55,000 nuclear warheads since 1949.
List of parties to the Treaty on the Non-Proliferation of Nuclear Weapons
The NPT remains the most widely subscribed to nuclear arms control treaty in history. As of February 2015, 190 states are recognized as parties to the treaty, excluding North Korea which withdrew. The State of Palestine is the most recent state to have joined, having submitted its instrument of succession on 10 February 2015. In addition, the Republic of China (Taiwan), which is currently only recognized by , ratified the treaty prior to the United Nations General Assembly's vote to transfer China's seat to the People's Republic of China (PRC) in 1971; Taiwan has accepted comprehensive IAEA safeguards and the measures of the Additional Protocol to verify that its nuclear program is entirely peaceful. Four UN member states have never signed the treaty: India, Israel, Pakistan, and South Sudan. The Cook Islands and Niue, two associated states of New Zealand which have had their "full treaty-making capacity" recognised by United Nations Secretariat, are not parties to the treaty but consider themselves bound by its provisions by virtue of their administration by New Zealand when the latter ratified the NPT.
List of nuclear weapons
On 25 May 2009, North Korea conducted a second test of nuclear weapons at the same location as the original test. The test weapon was of the same magnitude as the atomic bombs dropped on Japan in the 2nd World War. At the same time of the test, North Korea tested two short range ballistic missiles. The country tested a 7 kt nuclear weapon on 2 February 2013. On 3 September 2017, North Korea conducted an underground thermonuclear test which had an estimated yield of 100kt to 250kt, according to various sources.
Treaty on the Non-Proliferation of Nuclear Weapons
Over the years the NPT has come to be seen by many Third World states as "a conspiracy of the nuclear 'haves' to keep the nuclear 'have-nots' in their place". This argument has roots in Article VI of the treaty which "obligates the nuclear weapons states to liquidate their nuclear stockpiles and pursue complete disarmament. The non-nuclear states see no signs of this happening". Some argue that the NWS have not fully complied with their disarmament obligations under Article VI of the NPT. Some countries such as India have criticized the NPT, because it "discriminated against states not possessing nuclear weapons on January 1, 1967," while Iran and numerous Arab states have criticized Israel for not signing the NPT. There has been disappointment with the limited progress on nuclear disarmament, where the five authorized nuclear weapons states still have 22,000 warheads among them and have shown a reluctance to disarm further.
Nuclear weapons and Israel
The State of Israel is widely believed to possess nuclear weapons. Current estimates put the size of the Israeli nuclear arsenal at between 80 and 400 nuclear warheads, and the country is believed to possess the ability to deliver them in a variety of methods including: aircraft; submarine-launched cruise missiles; and the Jericho series of intermediate to intercontinental range ballistic missiles. Its first deliverable nuclear weapon is thought to have been created in late 1966 or early 1967; which would make it the sixth country in the world to have developed them.
Nuclear weapons of the United States
The U.S. and Russia possess comparable numbers of nuclear warheads; together, these two nations possess more than 90% of the world's nuclear warheads. As of 2017, the U.S. has an inventory of 6,800 nuclear warheads; of these, 2,800 are retired and awaiting dismantlement and 4,018 are part of the U.S. stockpile. Of the stockpiled warheads, the U.S. stated in its April 2017 New START declaration that 1,411 are deployed on 673 ICBMs, SLBMs, and strategic bombers.
List of states with nuclear weapons
Nuclear weapons have been present in many nations, often as staging grounds under control of other powers. However, in only one instance has a nation given up nuclear weapons after being in full control of them. The fall of the Soviet Union left several former Soviet republics in physical possession of nuclear weapons, though not operational control which was dependent on Russian-controlled electronic Permissive Action Links and the Russian command and control system.
Germany and weapons of mass destruction
Germany is among the powers which possess the ability to create nuclear weapons, but has agreed not to do so under the Treaty on the Non-Proliferation of Nuclear Weapons and Two Plus Four Treaty. Along with most other industrial nations, Germany produces components that can be used for creating deadly agents, chemical weapons, and other WMD. Alongside other companies from the United Kingdom, the Netherlands, India, the United States, Belgium, Spain, and Brazil, German companies provided Iraq with precursors of chemical agents used by Iraq to engage in chemical warfare during the Iran–Iraq War.
United States and weapons of mass destruction
In addition to this, the U.S. military can also deploy smaller tactical nuclear weapons either through cruise missiles or with conventional fighter-bombers. The U.S. maintains about 400 nuclear gravity bombs capable of use by F-15, F-16, and F-35. Some 350 of these bombs are deployed at seven airbases in six European NATO countries; of these, 180 tactical B61 nuclear bombs fall under a nuclear sharing arrangement.
Nuclear sharing
Of the three nuclear powers in NATO (France, the United Kingdom and the United States), only the United States is known to have provided weapons for nuclear sharing. , Belgium, Germany, Italy, the Netherlands and Turkey are hosting U.S. nuclear weapons as part of NATO's nuclear sharing policy. Canada hosted weapons under the control of the North American Aerospace Defense Command (NORAD), rather than NATO, until 1984, having left the NATO program in 1972 and Greece until 2001. The United Kingdom also received U.S. tactical nuclear weapons such as nuclear artillery and Lance missiles until 1992, even though the UK is a nuclear-weapon state in its own right; these were mainly deployed in Germany.
Treaty on the Prohibition of Nuclear Weapons
Many of the non-nuclear-armed members of the North Atlantic Treaty Organization (NATO), along with Australia and Japan, are also resistant to a ban treaty, as they believe that US nuclear weapons enhance their security. A statement was put forward by several NATO members (not including France, the United States, nor the United Kingdom, the nuclear weapon states within NATO), claiming that the treaty will be 'ineffective in eliminating nuclear weapons' and instead calling for advanced implementation of Article VI of the Non-Proliferation Treaty.
Nuclear sharing
In peacetime, the nuclear weapons stored in non-nuclear countries are guarded by United States Air Force (USAF) personnel and previously, some nuclear artillery and missile systems were guarded by United States Army (USA) personnel; the Permissive Action Link codes required for arming them remain under American control. In case of war, the weapons are to be mounted on the participating countries' warplanes. The weapons are under custody and control of USAF Munitions Support Squadrons co-located on NATO main operating bases who work together with the host nation forces.
, 180 tactical B61 nuclear bombs of the 480 U.S. nuclear weapons believed to be deployed in Europe fall under the nuclear sharing arrangement. The weapons are stored within a vault in hardened aircraft shelters, using the USAF WS3 Weapon Storage and Security System. The delivery warplanes used are F-16s and Panavia Tornados.
Historically, the shared nuclear weapon delivery systems were not restricted to bombs. Greece used Nike-Hercules Missiles as well as A-7 Corsair II attack aircraft. Canada had Bomarc nuclear-armed anti-aircraft missiles, Honest John surface-to-surface missiles and the AIR-2 Genie nuclear-armed air-to-air rocket, as well as tactical nuclear bombs for the CF-104 fighter. PGM-19 Jupiter medium range ballistic missiles were shared with Italian air force units and Turkish units with U.S. dual key systems to enable the warheads. PGM-17 Thor intermediate range ballistic missiles were forward deployed to the UK with RAF crews. An extended version of nuclear sharing, the NATO Multilateral Force was a plan to equip NATO surface ships of the member states with UGM-27 Polaris missiles, but the UK ended up purchasing the Polaris missiles and using its own warheads, and the plan to equip NATO surface ships was abandoned.
After the Soviet Union collapsed, the nuclear weapon types shared within NATO were reduced to tactical nuclear bombs deployed by Dual-Capable Aircraft (DCA). According to the press, Eastern European Member States of NATO have resisted the withdrawal of the shared nuclear bombs from Europe, fearing it would show a weakening of U.S. commitment to defend Europe against Russia.
20th-century events
Nuclear weapons brought an entirely new and terrifying possibility to warfare: a nuclear holocaust. While at first the United States held a monopoly on the production of nuclear weapons, the Soviet Union, with some assistance from espionage, managed to detonate its first weapon (dubbed "Joe-1" by the West) in August 1949. The post-war relations between the two, which had already been deteriorating, began to rapidly disintegrate. Soon the two were locked in a massive stockpiling of nuclear weapons. The United States began a crash program to develop the first hydrogen bomb in 1950, and detonated its first thermonuclear weapon in 1952. This new weapon was alone over 400 times as powerful as the weapons used against Japan. The Soviet Union detonated a primitive thermonuclear weapon in 1953 and a full-fledged one in 1955.
Tehran International Conference on Disarmament and Non-Proliferation, 2010
Supreme Leader of Iran Ayatollah Seyyed Ali Khamenei sent a message to the nuclear disarmament conference clarifying that "Iran regards using nuclear weapons as forbidden in Islam and it is incumbent on everyone to safeguard humanity from such weapons," while "every nation is entitled to the peaceful use of this technology." He called the US the world's "only nuclear scofflaw" for its advocating of arms control while maintaining a huge nuclear arsenal of its own as well as support for Israel notwithstanding their atomic arsenal despite not being a signatory of the Nuclear Nonproliferation Treaty (NPT). (The US and Iran are signatories of the NPT.)
Nuclear weapons of the United States
The United States was the first country to manufacture nuclear weapons and is the only country to have used them in combat, with the separate bombings of Hiroshima and Nagasaki in World War II. Before and during the Cold War, it conducted over a thousand nuclear tests and tested many long-range nuclear weapons delivery systems.
Southeast Asian Nuclear-Weapon-Free Zone Treaty
The SEANWFZ treaty has a protocol that is open to signature by the five recognized nuclear-weapon states: China, France, Russia, the United Kingdom, and the United States. The protocol commits those states not to contribute to any violation of the treaty and not to use or threaten to use nuclear weapons within the zone.
List of nuclear weapons
The BBC News Online website published an article on 28 May 2008, which quotes former U.S. President Jimmy Carter as stating that Israel has at least 150 nuclear weapons. The article continues to state that this is the second confirmation of Israel's nuclear capability by a U.S. spokesman following comments from U.S. Defense Secretary Robert Gates at a Senate hearing and had apparently been confirmed a short time later by Israeli Prime Minister Ehud Olmert.
The ATOM Project
On May 6, 2014 the five largest nuclear powers signed a guarantee not to use nuclear weapons in the territory of Central Asia. The powers: Britain, China, Russia, USA and France signed the 'Protocol to the Treaty on a Nuclear-Weapon-Free Zone in Central Asia' (Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan and Uzbekistan).
Treaty on the Prohibition of Nuclear Weapons
The Treaty on the Prohibition of Nuclear Weapons (TPNW), or the Nuclear Weapon Ban Treaty, is the first legally binding international agreement to comprehensively prohibit nuclear weapons, with the goal of leading towards their total elimination. It was passed on 7 July 2017. In order to come into effect, signature and ratification by at least 50 countries is required. For those nations that are party to it, the treaty prohibits the development, testing, production, stockpiling, stationing, transfer, use and threat of use of nuclear weapons, as well as assistance and encouragement to the prohibited activities. For nuclear armed states joining the treaty, it provides for a time-bound framework for negotiations leading to the verified and irreversible elimination of its nuclear weapons programme.
Thermonuclear weapon
The Soviets demonstrated the power of the "staging" concept in October 1961, when they detonated the massive and unwieldy "Tsar Bomba", a 50 megaton hydrogen bomb that derived almost 97% of its energy from fusion. It was the largest nuclear weapon developed and tested by any country.
Yellow Sun (nuclear weapon)
Although the first British designed thermonuclear weapon to be deployed, Yellow Sun was not the first to be deployed with the RAF. US Mk-28 and Mk-43 thermonuclear bombs and others had been supplied to the RAF for use in V bombers prior to the deployment of Yellow Sun. Some bombers of the V-force only ever used American weapons supplied under dual-key arrangements.
Nuclear arms race
In addition to the United States and the Soviet Union, three other nations, the United Kingdom, People's Republic of China, and France developed nuclear weapons during the early cold war years.
Netherlands and weapons of mass destruction
At present (2008), the USAF still provides 22 tactical B61 nuclear bombs for use by the Netherlands under the NATO nuclear weapons sharing agreement. These weapons are stored at Volkel Air Base and, in time of war, they may be delivered by Royal Netherlands Air Force F-16 warplanes. (The Dutch government has never formally admitted or denied the presence of these weapons, but former prime ministers Dries van Agt and Ruud Lubbers both acknowledged their presence in 2013.)
United Nations Security Council election, 2011
With the election of Pakistan to the Security Council, seven of the nine countries known to have nuclear weapons are members of the Council in 2012: China, France, India, Pakistan, Russia, the United States and the United Kingdom (the two nuclear powers not on the Council in 2012 are Israel and North Korea).
List of states with nuclear weapons
These five states are known to have detonated a nuclear explosive before 1 January 1967 and are thus nuclear weapons states under the Treaty on the Non-Proliferation of Nuclear Weapons. They also happen to be the UN Security Council's permanent members with veto power on UNSC resolutions.
List of states with nuclear weapons
The following is a list of states that have admitted the possession of nuclear weapons or are presumed to possess them, the approximate number of warheads under their control, and the year they tested their first weapon and their force configuration. This list is informally known in global politics as the "Nuclear Club". With the exception of Russia and the United States (which have subjected their nuclear forces to independent verification under various treaties) these figures are estimates, in some cases quite unreliable estimates. In particular, under the Strategic Offensive Reductions Treaty thousands of Russian and U.S. nuclear warheads are inactive in stockpiles awaiting processing. The fissile material contained in the warheads can then be recycled for use in nuclear reactors.
Nuclear holocaust
As of 2016, humanity has about 15,000 nuclear weapons, thousands of which are on hair-trigger alert. While stockpiles have been on the decline following the end of the Cold War, every nuclear country is currently undergoing modernization of its nuclear arsenal. Some experts believe this modernization may increase the risk of nuclear proliferation, nuclear terrorism, and accidental nuclear war.
Treaty on the Non-Proliferation of Nuclear Weapons
Opened for signature in 1968, the treaty entered into force in 1970. As required by the text, after twenty-five years, NPT Parties met in May 1995 and agreed to extend the treaty indefinitely. More countries have adhered to the NPT than any other arms limitation and disarmament agreement, a testament to the treaty's significance. As of August 2016, 191 states have adhered to the treaty, though North Korea, which acceded in 1985 but never came into compliance, announced its withdrawal from the NPT in 2003, following detonation of nuclear devices in violation of core obligations. Four UN member states have never accepted the NPT, three of which are thought to possess nuclear weapons: India, Israel, and Pakistan. In addition, South Sudan, founded in 2011, has not joined.
No first use
Pakistan, Russia, the United Kingdom, the United States, and France say they will use nuclear weapons against either nuclear or non-nuclear states only in the case of invasion or other attack against their territory or against one of their allies. Historically, NATO military strategy, taking into account the numerical superiority of Warsaw Pact conventional forces, assumed that the use of tactical nuclear weapons would have been required in defeating a Soviet invasion.
Nuclear weapon
Additional treaties and agreements have governed nuclear weapons stockpiles between the countries with the two largest stockpiles, the United States and the Soviet Union, and later between the United States and Russia. These include treaties such as SALT II (never ratified), START I (expired), INF, START II (never ratified), SORT, and New START, as well as non-binding agreements such as SALT I and the Presidential Nuclear Initiatives of 1991. Even when they did not enter into force, these agreements helped limit and later reduce the numbers and types of nuclear weapons between the United States and the Soviet Union/Russia.
Nuclear weapon design
In the ensuing fifty years, nobody has come up with a more efficient way to build a nuclear bomb. It is the design of choice for the United States, Russia, the United Kingdom, China, and France, the five thermonuclear powers. On 3 September 2017 North Korea carried out what it reported as its first "two-stage thermo-nuclear weapon" test. According to Dr. Theodore Taylor, after reviewing leaked photographs of disassembled weapons components taken before 1986, Israel possessed boosted weapons and would require supercomputers of that era to advance further toward full two-stage weapons in the megaton range without nuclear test detonations. The other nuclear-armed nations, India and Pakistan, probably have single-stage weapons, possibly boosted.
Global issue
Four countries besides the five recognized Nuclear Weapons States have acquired, or are presumed to have acquired, nuclear weapons: India, Pakistan, North Korea, and Israel. None of these four is a party to the NPT, although North Korea acceded to the NPT in 1985, then withdrew in 2003 and conducted announced nuclear tests in 2006, 2009, 2013, 2016, and 2017. One critique of the NPT is that the treaty is discriminatory in the sense that only those countries that tested nuclear weapons before 1968 are recognized as nuclear weapon states while all other states are treated as non-nuclear-weapon states who can only join the treaty if they forswear nuclear weapons.
Nuclear weapons testing
Almost all new nuclear powers have announced their possession of nuclear weapons with a nuclear test. The only acknowledged nuclear power that claims never to have conducted a test was South Africa (although see Vela Incident), which has since dismantled all of its weapons. Israel is widely thought to possess a sizable nuclear arsenal, though it has never tested, unless they were involved in Vela. Experts disagree on whether states can have reliable nuclear arsenals—especially ones using advanced warhead designs, such as hydrogen bombs and miniaturized weapons—without testing, though all agree that it is very unlikely to develop significant nuclear innovations without testing. One other approach is to use supercomputers to conduct "virtual" testing, but codes need to be validated against test data.
Nuclear weapons and the United Kingdom
The United Kingdom was the third country (after America and the Soviet Union) to develop and test nuclear weapons, and is one of the five nuclear-weapon states under the Treaty on the Non-Proliferation of Nuclear Weapons. The possession of nuclear weapons is an important component of Britain's national identity.
Nuclear weapons and the United Kingdom
The British hydrogen bomb programme demonstrated Britain's ability to produce thermonuclear weapons in the Operation Grapple nuclear tests in the Pacific, and led to the amendment of the McMahon Act. Since the 1958 US–UK Mutual Defence Agreement, the US and the UK have cooperated extensively on nuclear security matters. The nuclear Special Relationship between the two countries has involved the exchange of classified scientific data and fissile materials such as uranium-235 and plutonium The UK has not had a programme to develop an independent delivery system since the cancellation of the Blue Streak in 1960. Instead, it has purchased US delivery systems for UK use, fitting them with warheads designed and manufactured by the UK's Atomic Weapons Establishment (AWE) and its predecessor. Under the 1963, Polaris Sales Agreement, the US supplied the UK with Polaris missiles and nuclear submarine technology. The US also supplied the RAF and British Army of the Rhine with nuclear weapons under Project E until 1992. Nuclear-capable American aircraft have been based in the UK since 1949, but the last US nuclear weapons were withdrawn in 2006.
Cuban Missile Crisis
By the time of the crisis in October 1962, total nuclear weapons in each country's stockpile numbered approximately 26,400 for the United States and 3,300 for the Soviet Union. At the peak of the crisis, the U.S. had some 3,500 nuclear weapons ready to be used on command with a combined yield of approximately 6,300 megatons. The Soviets had considerably less strategic firepower at their disposal (some 300-320 bombs and warheads), lacking submarine-based weapons in a position to threaten the U.S. mainland and having most of their intercontinental delivery systems based on bombers that would have difficulty penetrating North American air defense systems. The U.S. had approximately 4,375 nuclear weapons deployed in Europe, most of which were tactical weapons such as nuclear artillery, with around 450 of them for ballistic missiles, cruise missiles, and aircraft; the Soviets had more than 550 similar weapons in Europe.
The enormity of how close the world came to thermonuclear war impelled Khrushchev to propose a far-reaching easing of tensions with the US. In a letter to President Kennedy dated October 30, 1962, Khrushchev outlined a range of bold initiatives to forestall the possibility of a further nuclear crisis, including proposing a non-aggression treaty between the North Atlantic Treaty Organization (NATO) and the Warsaw Pact or even disbanding these military blocs, a treaty to cease all nuclear weapons testing and even the elimination of all nuclear weapons, resolution of the hot-button issue of Germany by both East and West formally accepting the existence of West Germany and East Germany, and US recognition of the government of mainland China. The letter invited counter-proposals and further exploration of these and other issues through peaceful negotiations. Khrushchev invited Norman Cousins, the editor of a major US periodical and an anti-nuclear weapons activist, to serve as liaison with President Kennedy, and Cousins met with Khrushchev for four hours in December 1962.
Nuclear propulsion
Nuclear-powered vessels are mainly military submarines, and aircraft carriers. Russia and America are the only countries that currently have nuclear-powered civilian surface ships, including icebreakers and Aircraft carriers. America currently (as of July 2018) has 11 Aircraft carriers in service, and all are powered by nuclear reactors. They use nuclear reactors as their power plants. For more detailed articles see:
Russia's Channel One Television news broadcast a picture and details of a nuclear-powered torpedo called "Status-6" on about 12 November 2015. The torpedo was stated as having a range of up to 10,000 km, a cruising speed of 100 knots, and operational depth of up to 1000 metres below the surface. The torpedo carried a 100-megaton nuclear warhead.
Nuclear umbrella
NATO involved others of the five official nuclear weapons states. The United Kingdom and Canada participated in the initial American development of the atomic bomb (Manhattan Project) during World War II, but were afterwards excluded from nuclear weapons secrets by act of the US Congress. Britain launched an independent nuclear weapons program; after Britain successfully developed thermonuclear weapons, the US and UK signed the 1958 US–UK Mutual Defence Agreement sharing American weapons designs, eliminating the need for independent development.
Nuclear weapons testing
The 1996 Comprehensive Nuclear-Test-Ban Treaty (CTBT) bans all nuclear explosions everywhere, including underground. For that purpose, the Preparatory Commission of the Comprehensive Nuclear-Test-Ban Treaty Organization is building an international monitoring system with 337 facilities located all over the globe. 85% of these facilities are already operational. , the CTBT has been signed by 183 States, of which 157 have also ratified. However, for the Treaty to enter into force it needs to be ratified by 44 specific nuclear technology-holder countries. These "Annex 2 States" participated in the negotiations on the CTBT between 1994 and 1996 and possessed nuclear power or research reactors at that time. The ratification of eight Annex 2 states is still missing: China, Egypt, Iran, Israel and the United States have signed but not ratified the Treaty; India, North Korea and Pakistan have not signed it.
Presidency of Harry S. Truman
The United States Atomic Energy Commission, directed by David E. Lilienthal until 1950, was in charge of designing and building nuclear weapons. The policy was 100% civilian control. The U.S. had only 9 atomic bombs in 1946, but the stockpile grew to 650 by 1951. Lilienthal wanted to give high priority to peaceful uses, especially nuclear power plants, but coal was cheap and the power industry was not interested. Construction of the first nuclear plant would not begin until 1954. In early 1950, Truman authorized the development of thermonuclear weapons, a more powerful version of atomic bombs. Truman's decision to develop thermonuclear weapons faced opposition from many liberals and some government officials, but Truman believed that the Soviet Union would likely develop the weapons, and he was unwilling to allow the Soviets to have such an advantage. The first test of thermonuclear weaponry was conducted by the United States in 1952, and the Soviet Union performed its own thermonuclear test in August 1953.
Historical nuclear weapons stockpiles and nuclear tests by country
The United Kingdom became a nuclear power in 1952, and their nuclear arsenal peaked at just under 500 nuclear weapons in 1981. France became a nuclear power in 1960, and French nuclear stockpiles peaked at just over 500 nuclear weapons in 1992. China developed its first nuclear weapon in 1964; its nuclear stockpile increased until the early 1980s, when it stabilized at between 200 and 260. India became a nuclear power in 1974, while Pakistan developed its first nuclear weapon in the 1980s. India and Pakistan currently have around one hundred nuclear weapons each. Pakistan's nuclear stockpile has increased rapidly, and it is speculated that Pakistan might have more nuclear weapons than the United Kingdom within a decade.
Nuclear Free World Policy
These countries are weary of nuclear weapons’ deployment above everything else. Although 8 states are exempted from ban on nuclear weapons, 5 nations retain a de jure status of a “nuclear weapon state.” These states are the United States of America, the United Kingdom, the People’s Republic of China, France and Russia—all of whom had already tested nuclear weapons before the NPT was signed. NWS’s right to possess a nuclear arsenal is countered by Article VI of the treaty, which says that they have a legal obligation to eventually disarm. They also criticized NWS countries for failing to meet their obligation to disarm, in addition to criticizing the 3 states non-signatory nuclear weapons-capable states (which are considered de facto nuclear weapons states). This was stated in point 4 of the Joint Declaration of 1998:
Strategic nuclear weapon
A feature of strategic nuclear weapons, especially in the transcontinental nature of the U.S.-USSR cold war with continent spanning superpower enemies that are oceans apart, is the greater range of their delivery apparatus (e.g. ICBMs), giving them the ability to threaten the enemy's command and control structure and national infrastructure, even though they are based many thousands of miles away in friendly territory. Intercontinental ballistic missiles with nuclear warheads are the primary strategic nuclear weapons, while short-range missiles are tactical. In addition, while tactical weapons are designed to meet battlefield objectives without destroying nearby friendly forces, one main purpose of strategic weapons is in the deterrence role, under the theory of mutually assured destruction. In the case of two small bordering nations, a strategic weapon could have a quite short range and still be designed or intended for strategic targeting. Specifically on the Korean peninsula with a nuclear armed North Korea facing off against a NPT compliant South Korea there have been calls to request a return US owned short range low yield nuclear weapons, nomenclatured as tactical by the US military, to provide a local strategic deterrent to the North's growing domestically produced nuclear arsenal and delivery systems.
Thermonuclear weapon
Mao Zedong decided to begin a Chinese nuclear-weapons program during the First Taiwan Strait Crisis of 1954–1955. The People's Republic of China detonated its first hydrogen (thermonuclear) bomb on June 17, 1967, 32 months after detonating its first fission weapon, with a yield of 3.31 Mt. It took place in the Lop Nor Test Site, in northwest China. China had received extensive technical help from the Soviet Union to jump-start their nuclear program, but by 1960, the rift between the Soviet Union and China had become so great that the Soviet Union ceased all assistance to China.
Nuclear weapons in popular culture
Pictures of nuclear weapons themselves (the actual casings) were not made public until 1960, and even those were only mock-ups of the "Fat Man" and "Little Boy" weapons dropped on Japan—not the more powerful weapons developed more recently. Diagrams of the general principles of operation of thermonuclear weapons have been available in very general terms since at least 1969 in at least two encyclopedia articles, and open literature research into inertial confinement fusion has been at least richly suggestive of how the "secondary" and "inter" stages of thermonuclear weapons work.
Nuclear power in India
As of 2016, India has signed civil nuclear agreements with 14 countries: Argentina, Australia, Canada, Czech Republic, France, Japan, Kazakhstan, Mongolia, Namibia, Russia, South Korea, the United Kingdom, the United States, and Vietnam. The 48-nation NSG granted a waiver to India on 6 September 2008 allowing it to access civilian nuclear technology and fuel from other countries. India the only known country with nuclear weapons which is not a party to the Non-Proliferation Treaty (NPT) but is still allowed to carry out nuclear commerce with the rest of the world.
Germany and weapons of mass destruction
The United States provides about 60 tactical B61 nuclear bombs for use by Germany under a NATO nuclear weapons sharing agreement. The bombs are stored at Büchel and Ramstein Air Bases, and in time of war would be delivered by Luftwaffe Panavia Tornado warplanes. As well as being a breach of the Protocols to the (revised) Treaty of Brussels (terminated in 2010), many countries believe this violates Articles I and II of the Nuclear Non-Proliferation Treaty (NPT), where Germany has committed:
Nuclear proliferation
At present, 189 countries are States Parties to the "Treaty on the Nonproliferation of Nuclear Weapons", more commonly known as the Nuclear Non-Proliferation Treaty or NPT. These include the five Nuclear Weapons States (NWS) recognized by the NPT: the People's Republic of China, France, Russian Federation, the UK, and the United States.
List of states with nuclear weapons
According to the Natural Resources Defense Council and the Federation of American Scientists, Israel likely possesses around 75–200 nuclear weapons. The Stockholm International Peace Research Institute estimates that Israel has approximately 80 intact nuclear weapons, of which 50 are for delivery by Jericho II medium-range ballistic missiles and 30 are gravity bombs for delivery by aircraft. SIPRI also reports that there was renewed speculation in 2012 that Israel may also have developed nuclear-capable submarine-launched cruise missiles.Under NATO nuclear weapons sharing, the United States has provided nuclear weapons for Belgium, Germany, Italy, the Netherlands, and Turkey to deploy and store. This involves pilots and other staff of the "non-nuclear" NATO states practicing, handling, and delivering the U.S. nuclear bombs, and adapting non-U.S. warplanes to deliver U.S. nuclear bombs. However, since all U.S. nuclear weapons are protected with Permissive Action Links, the host states cannot easily arm the bombs without authorization codes from the U.S. Department of Defense. Former Italian President Francesco Cossiga acknowledged the presence of U.S. nuclear weapons in Italy. U.S. nuclear weapons were also deployed in Canada as well as Greece from 1963 to 1984. However, Canada withdrew three of the four nuclear-capable weapons systems by 1972. The single system retained, the AIR-2 Genie, had a yield of 1.5 kilotons, was designed to strike enemy aircraft as opposed to ground targets, and might not have qualified as a weapon of mass destruction given its limited yield.
Thermonuclear weapon
According to the scientific data received and published by PAEC, the Corps of Engineers, and Kahuta Research Laboratories (KRL), in May 1998, Pakistan carried out six underground nuclear tests in Chagai Hills and Kharan Desert in Balochistan Province (see the code-names of the tests, "Chagai-I" and "Chagai-II"). None of these boosted fission devices was the thermonuclear weapon design, according to KRL and PAEC.
List of states with nuclear weapons
The United Kingdom tested its first nuclear weapon ("Hurricane") in 1952. The UK had provided considerable impetus and initial research for the early conception of the atomic bomb, aided by Austrian, German and Polish physicists working at British universities who had either fled or decided not to return to Nazi Germany or Nazi controlled territories. The UK collaborated closely with the United States and Canada during the Manhattan Project, but had to develop its own method for manufacturing and detonating a bomb as U.S. secrecy grew after 1945. The United Kingdom was the third country in the world, after the United States and Soviet Union, to develop and test a nuclear weapon. Its programme was motivated to have an independent deterrent against the Soviet Union, while also maintaining its status as a great power. It tested its first hydrogen bomb in 1957 (Operation Grapple), making it the third country to do so after the United States and Soviet Union. The UK maintained a fleet of V bomber strategic bombers and ballistic missile submarines (SSBNs) equipped with nuclear weapons during the Cold War. It currently maintains a fleet of four 'Vanguard' class ballistic missile submarines equipped with Trident II missiles. In 2016, the UK House of Commons voted to renew the British nuclear weapons system with the "Dreadnought"-class submarine, without setting a date for the commencement of service of a replacement to the current system.
United Nations Security Council Resolution 1747
Iran and weapons of mass destruction:
As of 2007, Iran is not known to possess weapons of mass destruction and has signed treaties repudiating their possessions, including the Biological Weapons Convention, the Chemical Weapons Convention, and the Nuclear Non-Proliferation Treaty (NPT). A number of countries, including the United States, the United Kingdom, and France, have accused Iran of a clandestine intention to develop nuclear weapons. By most estimates, Iran is at least two to six years away from being able to produce an atomic bomb, even if it wanted to.
Germany and weapons of mass destruction
As part of the accession negotiations of West Germany to the Western European Union at the London and Paris Conferences, the country was forbidden (by Protocol No III to the revised Treaty of Brussels of 23 October 1954) to possess nuclear, biological or chemical weapons. This was reiterated in domestic law by the War Weapons Control Act (Kriegswaffenkontrollgesetz). During the Cold War, nuclear weapons were deployed in Germany by both the United States (in West Germany) and the Soviet Union (in East Germany). Despite not being among the nuclear powers during the Cold War, Germany had a political and military interest in the balance of nuclear capability. In 1977, after the Soviet deployment of the new SS-20 IRBM, West German chancellor Helmut Schmidt expressed concern over the capability of NATO's nuclear forces compared to those of the Soviets. Later in the Cold War under the chancellorship of Helmut Kohl, the West German government expressed concern about the progress of the nuclear arms race. Particularly, they addressed the eagerness of Germany's NATO allies, the United States and United Kingdom, to seek restrictions on long-range strategic weapons while modernizing their short-range and tactical nuclear systems. Germany wanted to see such short range systems eliminated, because their major use was not deterrence but battlefield employment. Germany itself, straddling the division of the Eastern and Western blocs in Europe, was a likely battlefield in any escalation of the Cold War and battlefield use of nuclear weapons would be devastating to German territory.
Neutron bomb
Although no country is currently known to deploy them in an offensive manner, all thermonuclear dial-a-yield warheads that have about 10 kiloton and lower as one dial option, with a considerable fraction of that yield derived from fusion reactions, can be considered able to be neutron bombs in use, if not in name. The only country definitely known to deploy dedicated (that is, not dial-a-yield) neutron warheads for any length of time is the Soviet Union/Russia, which inherited the USSR's neutron warhead equipped ABM-3 Gazelle missile program. This ABM system contains at least 68 neutron warheads with a 10 kiloton yield each and it has been in service since 1995, with inert missile testing approximately every other year since then (2014). The system is designed to destroy incoming "endoatmospheric" level nuclear warheads aimed at Moscow and other targets and is the lower-tier/last umbrella of the A-135 anti-ballistic missile system (NATO reporting name: ABM-3).
Nuclear power in the European Union
Nuclear power in the European Union accounted for approximately 15% of total energy consumption in 2005. The energy policies of the European Union (EU) member countries vary significantly. As of January 2010, 14 out of 27 countries have nuclear reactors. The countries with reactors are: Belgium, Bulgaria, Czech Republic, Finland, France, Germany, Hungary, Netherlands, Romania, Slovakia, Slovenia, Spain, Sweden, and the United Kingdom.
IAEA safeguards
The Treaty on the Nonproliferation of Nuclear Weapons (NPT) opened for signature in 1968 and entered into force in 1970. The NPT defines nuclear weapons states as the United States of America, the United Kingdom of Great Britain and Northern Ireland, the People’s Republic of China, the Russian Federation, and France. The treaty requires signatories to become members of the IAEA. Nuclear weapons states are responsible for working toward disarmament and non-nuclear weapons states must submit to IAEA safeguards. The treaty requires that non-nuclear weapons states conclude comprehensive safeguards agreements under INFCIRC 153. The NPT is the centerpiece of global efforts to prevent the further spread of nuclear weapons.