Commemorate the anniversaries of several milestone space explorations during Family Day from 9 a.m.-3 p.m. on July 18, 2015, at the National Museum of the U.S. Air Force. In this photo, Apollo 15 Commander Dave Scott salutes the American flag at the Hadley-Apennine lunar landing site. The Lunar Module "Falcon" is partially visible on the right. (Photo courtesy of NASA)