Fourth Spy Unearthed in U.S. Atomic Bomb Project

The United States detonated world’s first atomic bomb on 16 July 1945. Four years later, in August 1949, the Soviet Union detonated a nearly identical device in Central Asia – an event which stunned the U.S. military and scientific communities, which did not believe the Soviet Union had the scientific and technical know-how to do so.

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