Astronaut Neil Armstrong, who became the first to walk on the moon as commander of Apollo 11, has died. He was 82 years old.

On July 20, 1969, half a billion people (a sixth of the world’s population at the time) watched a ghostly black-and-white television image as Armstrong backed down the ladder of the lunar landing ship Eagle, planted his left foot on the moon’s surface, and said, “That’s one small step for a man, one giant leap for mankind.”

RIP Neil Armstrong.

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