Title: Sleeper Agent
Subjects: World history, Biography, Spies, World War, 1939-1945, Secret service, Soviet Espionage, History, Nuclear weapons, Chemists, Russian Americans, Espions, Biographies, Guerre mondiale, 1939-1945, Service secret, Espionnage soviétique, Histoire, Armes nucléaires, Manhattan Project (U.S.), United States. Army. Special Engineer Detachment, 9812th, United States