Space shuttle Discovery, mounted atop a NASA 747 Shuttle Carrier Aircraft is seen a few hours before being demated at Washington Dulles International Airport

 
Space shuttle Discovery, mounted atop a NASA 747 Shuttle Carrier Aircraft is seen a few hours before being demated at Washington Dulles International Airport
Discovery is attached to a NASA 747 Shuttle Carrier Aircraft at Washington Dulles International Airport on April 18, 2012.