U.S, U.K, and USSR make a treaty to limit a-bomb testing
A Strategic Arms Limitation Treaty between the USA and USSR. The US did not ratify the treatydue to the Soviet invasion of Afghanistan.
USSR tests first A-Bomb
The "King of Bombs," a nickname for the Soviet AN602 hydrogen bomb, the most powerful weapon ever detonated.
The first American satellite to reach orbit.
Launched on a Earth-Moon trajectory.
First successful weather satellite, is launched http://spaceplex.com/wp-content/uploads/2010/05/trios1-230x200.jpg
Alan B. Shepard becomes the first American in space
Orbited the earth three times.