NASA testing Apollo 11 rocket engine

Associated Press
In this July 20, 1969 file photo, a footprint left by one of the astronauts of the Apollo 11 mission shows in the soft, powder surface of the moon. Commander Neil A. Armstrong and Air Force Col. Edwin E.

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Engineers hope to gain valuable knowledge from the engine, which was originally supposed to power the Apollo 11 moon mission in 1969 but was grounded by a problem.

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