NASA holds a news conference on the 40th Anniversary of the moon landing in Washington

From left to right, former astronauts, Walt Cunningham, Apollo 7, James Lovell Apollo 8 and Apollo 11, David Scott Apollo 9 and Apollo 15, Buzz Aldrin, Apollo 11, Charles Duke, Apollo 16, Thomas Stafford Apollo 10 and Eugene Cernan, Apollo 10 and Apollo 17, speak on the 40th anniversary of the lunar landing and their experiences during a news conference at NASA headquarters in Washington on July 20, 2009. (UPI Photo/Kevin Dietsch)