From satellites to the moon, NASA has conducted dozens of successful missions to space. These are some of the most famous. We'll start with a look at NASA's first space station.
The Gemini 4 mission saw the first spacewalk of the American space program.
3. Reaching Orbit
John Glenn becomes the first American to orbit the Earth.
2. Freedom 7
Alan Shepard becomes the first American in space.
1. Winning the Space Race
NASA achieved the impossible with the success of the Apollo 11 mission.