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A chronicle of man's achievements in space begins with the German V-2 rocket, Chuck Yeager's breaking of the sound barrier, and Sputnik 1.

The Mercury program reflects America's determination to overtake Soviet achievements in space.

The intense race to the moon ends with Neil Armstrong's footprints in the Sea of Tranquility on July 20, 1969.

The history of the U.S. space shuttle includes the Challenger disaster and its long-term impact.