Space shuttle Discovery bolted to the top of a Shuttle Carrier Aircraft SCA will take off from on April 17.

This is an aerial view of the long Shuttle Landing Facility SLF runway at NASA's Kennedy Space Center in Florida that space shuttle Discovery, bolted to the top of a Shuttle Carrier Aircraft SCA, will take off from on April 17. Discovery's last crew members are expected to be at the runway, along with Kennedy employees and guests, as the center says goodbye to the agency's most-flown shuttle. The SCA, designated NASA 905, will ferry Discovery to the Washington Dulles International Airport in Virginia, after which the shuttle will be moved for public display in the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center on April 19.

For more information on the SCA, visit http://www.nasa.gov/centers/dryden/news/FactSheets/FS-013-DFRC.html. For more information on shuttle transition and retirement activities, visit http://www.nasa.gov/transition. Photo credit: NASA/Kim Shiflett