NASA Apollo 11 Mission Commander Neil Armstrong, right, jokes with the crew of the STS-125 mission, from left, Andrew Feustel, Apollo 11 Command Module Pilot Michael Collins, Megan McArthur, Scott Altman, and John Grunsfeld during the Apollo 40th anniversary celebration held at the National Air and Space Museum, Monday, July 20, 2009 in Washington. Photo Credit: (NASA/Bill Ingalls)
