The Cold War Expands. Section 16.3. How Quickly Winning can Change. 2 Sept 1949 – A B-29 flying over Alaska detects atmospheric radiation It was drifting east from Siberia The Soviet Union had an atomic bomb!. The Rules just changed. 1949 – USSR exploded its first A-Bomb
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Father of the
Fusion Reaction (H-Bomb)
Fission Reaction (A-Bomb)
seen and felt 1,000 km away. The heat from the explosion could have caused third degree burns 100 km away from ground zero. The subsequent mushroom cloud was about 60 km high (nearly seven times higher than Mount Everest) and 30–40 km wide. The explosion could be seen and felt in Finland, even breaking windows there. Atmospheric focusing caused blast damage up to 1,000 km away. The seismic shock created by the detonation was measurable even on its third passage around the Earth.
Policy in which the United States and the Soviet Union hoped to deter nuclear war by building up enough weapons to destroy one another
President Dwight D. Eisenhower
Premier Nikita Khrushchev