A warning sign is seen on the entrance to Firing Room Four of the Launch Control Center at NASA's Kennedy Space Center in Cape Canaveral, Florida, Sunday, July 12, 2009. The space shuttle Endeavour is set to launch at 7:13p.m. EDT with the crew of STS-127 and start a 16-day mission that will feature five spacewalks and complete construction of the Japan Aerospace Exploration Agency's Kibo laboratory. Photo Credit: (NASA/Bill Ingalls)
