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Apollo 11 was the spaceflight that landed the first
humans on the Moon, Americans Neil Armstrong
and Buzz Aldrin, on July 20, 1969.
Armstrong became the first to step onto the lunar
surface 6 hours later on July 21 Armstrong spent
about two and a half hours outside the spacecraft,
Aldrin slightly less; and together they collected 47.5
pounds (21.5 kg) of lunar material for return to Earth.
A third member of the mission, Michael Collins,
piloted the command spacecraft alone in lunar orbit
until Armstrong and Aldrin returned to it just under
a day later for the trip back to Earth.
One small step for man,
one giant leap for
President Barack Obama chats with Apollo 11 astronauts, from
left, Buzz Aldrin, Michael Collins and Neil Armstrong, Monday, July
20, 2009, on the 40th anniversary of the Apollo 11 lunar landing.