First Soviet atomic bomb test. Known as Joe-1 to the West, referencing Joseph Stalin, it was called "First Lightning" (Первая молния, Pervaya molniya) in the USSR.
The "King of Bombs," a nickname for the Soviet AN602 hydrogen bomb, the most powerful weapon ever detonated.
Treaty between UK, USSR and US limits nuclear testing. France and China reject it and develop their own weapons.
James C. Hagerty, president Eisenhower's press secretary, announced that the U.S. planned to launch "small Earth circling satellites" between 1 July 1957 and 31 December 1958 as part of the International Geophysical Year (IGY)
this ended the space race.
First man in space and orbited the earth once