Apollo 11 astronauts end 21 days in quarantine and finally return home.
New technology, set for major test in 2022, might hold one of the keys to a crewed mission to Mars.
With alarms sounding and fuel running low, Armstrong and Aldrin become the first humans on the Moon.
Missions have dramatic potential implications for deep space exploration.
Meeting in 1962 settles key question in race to land on the Moon.
Eleven companies will work on aspects of reusable system to shuttle astronauts to and from the Moon.