Space shuttle Atlantis on STS-135

Space shuttle Atlantis, STS-135 astronauts, left to right, Commander Christopher Ferguson, Pilot Douglas Hurley, Sandra Magnus and Rex Walheim wave American flags Monday July 4, 2011 after arriving to the Kennedy Space Center in Florida. The crew of 4 are the last of U.S. astronauts to fly... RED HUBER, ORLANDO SENTINEL