Photographers take photos of the Space Shuttle Endeavour carried piggyback atop a Boeing 747 jumbo jet, making its last and final landing at Edwards Air Force Base in California, September 20, 2012, after a cross-country trip to Los Angeles to begin its final mission as a museum exhibit. Endeavour is scheduled to take off for its final ferry flight again on Friday, and the final airborne journey of the entire space shuttle fleet, headed for Los Angeles International Airport. [Photo/Agencies]