The crew of the Space Shuttle Discovery poses for photographers after arriving at the Kennedy Space Center in Cape Canaveral, Fla., at the completion of mission STS-121 Monday, July 17, 2006. From left: Mission Specialist Michael Fossum, Mission Specialist Lisa Nowak, Commander Steven Lindsey, Mission Specialist Stephanie Wilson, Pilot Mark Kelly and British born U.S. astronaut Piers Sellers. Credit: AP Photo/Robert Sullivan
