Closing the landing gear doors is one of the final servicing steps before lifting of the Space Shuttle Discovery and mating it to NASA's 747 can begin. After being raised in the gantry-like Mate-Demate Device (MDD), Discovery will be mounted on NASA's modified Boeing 747 Shuttle Carrier Aircraft, or SCA, for the return flight to the Kennedy Space Center in Florida.Space Shuttle Discovery landed safely at NASA's Dryden Flight Research Center at Edwards Air Force Base in California at 5:11:22 a.m. PDT, August 9, 2005, following the very successful 14-day STS-114 return to flight mission.During their two weeks in space, Commander Eileen Collins and her six crewmates tested out new safety procedures and delivered supplies and equipment the International Space Station.Discovery spent two weeks in space, where the crew demonstrated new methods to inspect and repair the Shuttle in orbit. The crew also delivered supplies, outfitted and performed maintenance on the International Space Sta