Georgii Nikolayevich Flyorov was a Soviet physicist who is known for his discovery of spontaneous fission and his important contribution towards the crystallography and material science, for which, he was honored with many awards. In addition, he is also known for his letter directed to Joseph Stalin, during the midst of World War II, to start the Soviet program of nuclear weapons in the former Soviet Union.
The commemorative stamp of Flyorov issued by Russia in 2013
Soviet atomic bomb project
The Soviet atomic bomb project was the classified research and development program that was authorized by Joseph Stalin in the Soviet Union to develop nuclear weapons during and after World War II.
The 1942 Russian report on the feasibility of uranium titled: Disposition No. 2352: "On the organization of work on uranium.
The 1945 sketch of circular shaped implosion-type passed by the American spies for the Soviet Union. This schematic was part of the development of RDS-1, test fired in Kazakhstan in 1949.
The mushroom cloud from the first air-dropped bomb test in 1951. This picture is confused with RDS-27 and RDS-37 tests.
The 1981 CIA intelligence data showing the Soviet nuclear weapons sites in throughout the former Soviet Union. Declassified in 2017.