Space Shuttle Discovery Landing
Space Shuttle Discovery mounted atop a 747 Shuttle Carrier Aircraft (SCA) approaches the runway for landing at Washington Dulles International Airport, Tuesday April 17, 2012, in Sterling, Va.
Space Shuttle Discovery Ready For Demate
Space shuttle Discovery, mounted atop a NASA 747 Shuttle Carrier Aircraft (SCA) is seen a few hours before being demated at Washington Dulles International Airport, Wednesday, April 18, 2012, in Sterling, VA.