Soviet atomic bomb project
Soviet Union program to develop nuclear weapons during and after World War II
Soviet atomic bomb project
The Soviet atomic bomb project was authorized by Joseph Stalin in the Soviet Union to develop nuclear weapons during and after World War II. Physicist Georgy Flyorov, suspecting a Western Allied nuclear program, urged Stalin to start research in 1942. Early efforts were made at Laboratory No. 2 in Moscow, led by Igor Kurchatov, and by Soviet-sympathizing atomic spies in the US Manhattan Project. Subsequent efforts involved plutonium production at Mayak in Chelyabinsk and weapon research and assembly at KB-11 in Sarov. After Stalin learned of the atomic bombings of Hiroshima and Nagasaki, the nuclear program was accelerated through intelligence gathering on the US and German nuclear weapon programs. Espionage coups, especially via Klaus Fuchs and David Greenglass, included detailed descriptions of the implosion-type Fat Man bomb and plutonium production. In the final months of the war, the Soviet "Russian Alsos" task force competed against the Western Allies' Alsos Mission to capture German...
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