NASA's Space Shuttle "Endeavour" continues to undergo modification for retirement at the Kennedy Space Center

The payload bay of NASA's space shuttle "Endeavour" remains open as the agency continues its post flight modification at the Kennedy Space Center, Florida on March 7, 2012. Once preparations are completed, NASA anticipates moving the shuttle to the California Science Center in Los Angeles to be placed on permanent public display. UPI/Joe Marino-Bill Cantrell