Workers escort space shuttle Endeavour as it is towed to the Mate-Demate Device after being backed out of the Vehicle Assembly Building.

Workers escort space shuttle Endeavour as it is towed to the Mate-Demate Device, or MDD, at NASA's Kennedy Space Center in Florida after being backed out of the Vehicle Assembly Building. The MDD is located at the Shuttle Landing Facility at Kennedy. The shuttle will be lifted and connected to the top of NASA's Shuttle Carrier Aircraft SCA, a modified 747 jetliner. The shuttle has been fitted with an aerodynamic tailcone for its flight aboard the SCA to Los Angeles where it will be placed on public display. Photo credit: NASA/Dmitri Gerondidakis