Space Shuttles Enterprise, left, and Discovery meet nose-to-nose at the beginning of a welcome ceremony at the Smithsonian National Air and Space Museum's Steven F. Udvar-Hazy Center, Thursday, April 19, 2012, in Chantilly, Va. Discovery replaced Enterprise inside the Center's James S. McDonnell Space Hangar after the ceremony, where it will remain on permanent display. Enterprise is slated to go on display at the Intrepid Sea, Air and Space Museum in New York City.