Remembering an American Hero, Neil Armstrong

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Neil Armstrong, U.S. civilian astronaut, became first man to walk on the moon as flight commander of Apollo 11 space mission, July 1969.

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The Apollo 11 crew leaves Kennedy Space Center's Manned Spacecraft Operations Building during the pre-launch countdown in this July 16, 1969 NASA handout photo. Mission commander Neil Armstrong, command module pilot Michael Collins, and lunar module pilot

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Undated image provided by NASA shows Neil Armstrong posing with a X-15.

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** FILE ** In this July 20, 1969 file photo, Apollo 11 astronauts Neil Armstrong and Edwin E. "Buzz" Aldrin, the first men to land on the moon, plant the U.S. flag on the lunar surface. (NASA)