NASA marks Apollo 11 mission to the Moon 40th Anniversary

U.S. President Richard Nixon (R) meets the Apollo 11 astronauts, Neil A. Armstrong (L), Edwin E. Aldrin,Jr. (2nd L), and Michael Collins, at the White House in Washington on November 5, 1969. NASA marks the 40th anniversary of the Apollo 11 mission to the Moon and the historic first "moonwalk" this year. During the eight-day space mission, Armstrong and Aldrin explored the Moon's surface and brought back rock samples for scientists to study. Collins piloted the command module in the lunar orbit during their 22-hour stay on the moon. (UPI Photo/NASA)