Soviets Get the Bomb

Cold War

The RDS-1 was the nuclear bomb used in the Soviet Union's first nuclear weapon test. ©Image Attribution forthcoming. Image belongs to the respective owner(s).

1949 Aug 29

Semipalatinsk Nuclear Test Sit

The RDS-1 was the nuclear bomb used in the Soviet Union's first nuclear weapon test. The United States assigned it the code-name Joe-1, in reference to Joseph Stalin. It was detonated on 29 August 1949 at 7:00 a.m., at the Semipalatinsk Test Site, Kazakh SSR, after top-secret research and development as part of the Soviet atomic bomb project.

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Last Updated: Wed Feb 07 2024

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