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'''Klaus Fuchs''' (1911-1988) was one of several Communist spies who independently leaked atomic secrets from the Manhattan Project at Los Alamos to the Soviet Union.  Fuchs was a brilliant German physicist who had belonged to the Communist Party of Germany in the 1930s.  Fuchs had scientific achievements in his own right, including a patent with John von Neumann and the discovery of the Fuchs-Nordheim model for calculating energies in nuclear reactions.<ref>http://209.85.165.104/search?q=cache:mOpQgi0wEyQJ:classes.engr.oregonstate.edu/ne/spring2001/ne453/Pulse-lab.doc+%22Fuchs-Nordheim%22&hl=en&ct=clnk&cd=5&gl=us&client=firefox-a</ref>

'''Klaus Fuchs''' (1911-1988) was one of several [[Communist]] spies who independently leaked atomic secrets from the [[Manhattan Project]] at [[Los Alamos]] to the Soviet Union.  Fuchs was a brilliant German physicist who had belonged to the Communist Party of Germany in the 1930s.  Fuchs had scientific achievements in his own right, including a patent with John von Neumann and the discovery of the Fuchs-Nordheim model for calculating energies in nuclear reactions.<ref>http://209.85.165.104/search?q=cache:mOpQgi0wEyQJ:classes.engr.oregonstate.edu/ne/spring2001/ne453/Pulse-lab.doc+%22Fuchs-Nordheim%22&hl=en&ct=clnk&cd=5&gl=us&client=firefox-a</ref>

In addition to passing secrets to the communist Soviet Union about the design of the [[atomic bomb]] and, after the war, initial attempts to design a [[hydrogen bomb]].   

In addition to passing secrets to the communist Soviet Union about the design of the [[atomic bomb]] and, after the war, initial attempts to design a [[hydrogen bomb]].