"Houston, Tranquillity Base here. The Eagle has landed." With these words, Neil Armstrong tells the world on July 20 that mankind finally has realized an age-old dream -- to walk on the moon. Armstrong and fellow astronaut Edwin "Buzz" Aldrin do so after flying for eight days aboard Apollo 11. Armstrong's first words after he sets foot on Earth's only natural satellite: "That's one small step for man, one giant leap for mankind."

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