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FILE - In this July 20, 1969, file photo, provided by NASA, 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. The family of Neil Armstrong, the first man to walk on the moon, says he has died at age 82 on Saturday, Aug. 25, 2012. Armstrong commanded the Apollo 11 spacecraft that landed on the moon July 20, 1969. He radioed back to Earth the historic news of "one giant leap for mankind." (AP Photo/NASA, File)

NASA testing Apollo 11 rocket engine

January 25, 2013

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.