The Shuttle Carrier Aircraft glides onto the apron of the runway at the Shuttle Landing Facility at NASA’s Kennedy Space Center in Florida. The aircraft arrived in Florida to prepare for shuttle Discovery’s ferry flight to the Washington Dulles International Airport in Sterling, Va., on April 17. Discovery will be placed on permanent public display in the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Chantilly, Va. Image credit: NASA/Jim Grossmann April 10, 2012