A man waves as he joins others standing atop a platform on one of the towers at the Washington National Cathedral, watching as the NASA Space Shuttle Discovery, being carried piggyback on a modified Boeing 747, makes it's way in the skies above Washington, D.C., Tuesday, April 17, 2012, as it makes it's way to the Steven F. Udvar-Hazy Center in Chantilly, Va. (Rod Lamkey Jr/The Washington Times)