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Technicians attach the tail cone, which helps reduce aerodynamic drag and turbulence during its ferry flight, to the Space Shuttle Discovery in preparation for its return to NASA's Kennedy Space Center in Florida. After the tail-cone is installed, Discovery will be mounted on NASA's modified Boeing 747 Shuttle Carrier Aircraft, or SCA, for the return flight. 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…