Neil Alden Armstrong (born August 5, 1930 – died August 25, 2012) was an American astronaut and the first person to walk on the Moon. After landing on the moon on July 20, 1969, Neil Armstrong and Buzz Aldrin were ready to go outside. The Apollo 11 Lunar Module (LEM) was depressurized, the hatch was opened and Armstrong descended first down the bottom of the ladder. Armstrong said, "I'm going to step off the LEM now". He then turned and set his left boot on the lunar surface on July 21, 1969, then spoke the famous words, "That's one small step for [a] man, one giant leap for mankind."

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