Ted Hall, Manhattan Project Spy
Theodore Alvin Hall (October 20, 1925 - November 1, 1999) was an American physicist and an atomic spy for the Soviet Union, who, during his work on American efforts to develop the first and second atomic bombs during World War II, gave a detailed description of the Fat Man plutonium bomb, and of several processes for purifying plutonium, to Soviet intelligence. Until the release of the Venona decrypts in 1980, nearly all of the espionage regarding the Los Alamos nuclear weapons program was attributed to Klaus Fuchs. Hall was questioned by the Federal Bureau of Investigation in March 1951 but wasn't charged. In a written statement published in 1997, Hall came very close to admitting that the accusations against him were true, although obliquely, saying that in the immediate postwar years, he felt strongly that an American monopoly on nuclear weapons was dangerous and should be avoided'. He died of renal cancer in 1999 at the age of 74
