The astronauts of space shuttle Endeavour, from left, commander Mark Kelly, Canadian born U.S. astronaut Greg Chamitoff, mission specialist Drew Feustel, European Space Agency astronaut Roberto Vittori, of Italy, mission specialist Mike Fincke and British born U.S. astronaut, pilot Greg Johnson, gather for a photo after arriving at the Kennedy Space Center in Cape Canaveral, Fla., Thursday, May 12, 2011. The astronauts for NASA's next-to-last space shuttle flight returned to Florida on Thursday for another try at launching to the International Space Station.
John Raoux Associated Press