Test bomb underwater/ground
Truman approves first H-bomb
Travel 6,000 miles accurately within its target
First atomic bomb by soviet union
Stalin dies
Treaty between UK, USSR, and USA to limit nuclear testing.
NASA was formed
Pioneer 1 launched and reached heights if 70,700 miles.
Explorer 1 launched to orbit
Discoverer XIV launched and first satelite in space.
First American spacewalk was in space for 23 minutes.
Sputnik 1 launched
Sputnik 3 is launched
First Russian in space became a soviet hero
First Russian Woman in space was chosen to fly out of 400 other women.