The crew of the space shuttle Endeavour leaves crew quarters for the launch pad at Kennedy Space Center in Cape Canaveral, Florida August 8, 2007. Clockwise from lower left are Pilot Charles Hobaugh, Rick Mastracchio, Barbara Morgan, Alvin Drew Jr., David Williams of the Canadian Space Agency, Tracy Caldwell, and Mission Commander Scott Kelly. The crew is set for launch aboard Endeavour on a mission to the International Space Station. [Reuters]