Space Shuttle Discovery Makes Its Final Voyage
After 39 missions -- the most of any space shuttle -- Discovery takes its final journey to the National Air & Space Museum, where it will be on permanent display.
Glenn Benson / NASA / Getty Images
The space shuttle Discovery, tethered to the back of the NASA 905 Shuttle Carrier Aircraft (SCA), is pictured flying over Florida shortly after leaving NASA's Kennedy Space Center on April 17, 2012.