Media representatives are on hand for the arrival of space shuttle Discovery at NASA's Kennedy Space Center in Florida.

Media representatives are on hand for the arrival of space shuttle Discovery at the mate-demate device, or MDD, at the Shuttle Landing Facility, or SLF, at NASA’s Kennedy Space Center in Florida. A tail cone has been installed over its three replica shuttle main engines to reduce aerodynamic drag and turbulence during its upcoming ferry flight.

The MDD is a large gantry-like steel structure used to hoist a shuttle off the ground and position it onto the back of a Shuttle Carrier Aircraft, or SCA. The SCA is a Boeing 747 jet, originally manufactured for commercial use, which was modified by NASA to transport the shuttles between destinations on Earth. The SCA designated NASA 905 is assigned to the remaining ferry missions, delivering the shuttles to their permanent public display sites. Discovery’s new home will be the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center in Chantilly, Va. 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/Dimitri Gerondidakis