G. Wayne Clough Secretary of the Smithsonian Institution speaks to those in attendance at a ceremony commemorating the transition of space shuttle Discovery to the Smithsonian National Air and Space Museum, Thursday, April 19, 2012, at the Steven F. Udvar-Hazy Center in Chantilly, Va. Discovery, the first orbiter retired from NASAâs shuttle fleet, completed 39 missions, spent 365 days in space, orbited the Earth 5,830 times, and traveled 148,221,675 miles. NASA will transfer Discovery to the National Air and Space Museum to begin its new mission to commemorate past achievements in space and to educate and inspire future generations of explorers. Photo Credit: (NASA/Paul E. Alers)
