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.
Military history of the Soviet Union
Most of the nuclear stockpile was inherited by Russia. Additional weapons were acquired by Ukraine, Belarus and Kazakhstan. Amid fears of nuclear proliferation, these were all certified as transferred to Russia by 1996. Uzbekistan is another former Soviet republic where nuclear weapons may once have been stationed, but they are now signers of the Nuclear non-proliferation treaty.