As he took his first step, Armstrong famously said, "That's one small step for man, one giant leap for mankind."
The Apollo 11 mission occurred eight years after President John F. Kennedy (1917-1963) announced a national goal of landing a man on the moon by the end of the 1960s.
Apollo 17, the final manned moon mission, took place in 1972.
An estimated one million people gathered on the beaches of central Florida to witness first-hand the launch of Apollo 11, while more than 500 million people around the world watched the event live on television, NASA said in a statement.
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