NASA's Space Shuttle "Endeavour" launch postponed he Kennedy Space Center.

The crew of NASA's space shuttle "Endeavour", lead by Commander Mark Kelly (front right), departs from their quarters to Launch Complex 39A at the Kennedy Space Center on April 29, 2011. Endeavour and her crew were to fly on a fourteen day mission, STS 134, to the International Space Station. The launch attempt has been postponed due to a faulty auxiliary power unit heater. NASA has rescheduled the launch to occur in 48 hours. UPI /Joe Marino - Bill Cantrell