What is Nuclear espionage?
'''Nuclear espionage''' is sharing a country's secrets about [[nuclear weapon]]s to other countries without permission. Since nuclear weapons have been invented, there have been many cases of known nuclear espionage, and also many cases where it has thought to have happened, but has not been proven. Because nuclear weapons are usually considered the most important of state secrets, all nations with nuclear weapons have strict rules against sharing information about how nuclear weapons are designed, where they are kept, and other things about them. There are also rules that keep countries who have signed [[nuclear proliferation|non-proliferation]] agreements (which are meant to stop the spread of nuclear weapons) from sharing information about such weapons with the public. ==Manhattan Project== [[Image:Klaus Fuchs ID badge.png|left|thumb|150px|[[Klaus Fuchs]] is considered to have been the most valuable of the Atomic Spies during the [[Manhattan Project]].]] [[Image:Greenglass bomb diagram.png|left|thumb|150px|A drawing of a nuclear weapon design by David Greenglass, showing what he supposedly gave the Rosenbergs to give to the Soviet Union.]] During the [[Manhattan Project]], which was when the [[United States]], the [[United Kingdom]], and [[Canada]] worked together during [[World War II]] to make the first nuclear weapons, there was much nuclear espionage in which scientists or technicians working for the project sent information about bomb development and designs to the [[Soviet Union]]. These people are often called the Atomic Spies, and their work continued into the early [[Cold War]]. There has been much disagreement over the exact details of these cases, though some of this was settled when [[VENONA]] Project transcripts were made public. These were secret messages between Soviet agents and the Soviet government that were discovered and decoded. Some issues remain unsettled, however. Some of the most well known of these were : *Klaus Fuchs – A physicist who had escaped Germany and who worked with the Br