Neil Armstrong, Michael Collins, Edwin "Buzz" Aldrin, Richard Nixon

FILE - In this photo taken July 24, 1969 U.S. President Richard Nixon, back to camera, greets the Apollo 11 astronauts in the quarantine van on board the U.S.S. Hornet after splashdown and recovery July 24, 1969. The Apollo 11 crew from left: Neil Armstrong, Michael Collins, and Edwin "Buzz" Aldrin. Splashdown was east of Wake Island, and south of Johnston Atoll. The first landing of a human being on the moon on July 20, 1969 celebrate its 40th anniversary this year 2009. (AP Photo/File)