From Hiroshima to the Cold War: How Soviet Spies Stole the Atomic Bomb | Full Documentary

On August 29, 1949, the world changed again: the Soviet Union detonated its first atomic bomb – years ahead of Western expectations. The secret to their rapid success? Espionage. Behind the scenes, Soviet intelligence orchestrated one of the most effective spy networks of the 20th century, infiltrating the top‑secret Manhattan Project as early as 1943. This episode of Spies of War investigates how brilliant scientists like Klaus Fuchs and others leaked nuclear secrets to the USSR, and how U.S. counter‑intelligence raced to expose them. From Los Alamos to Moscow, discover how espionage reshaped the global balance of power in the early Cold War.