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CAPE CANAVERAL, Fla. -- One of the shuttle training aircraft, or STA, takes off from the runway at NASA Kennedy Space Center's Shuttle Landing Facility. Handling the controls is the pilot of the STS-124 mission, Ken Ham, who will practice landing the shuttle. The STA is a Grumman American Aviation-built Gulf Stream II jet that was modified to simulate an orbiter's cockpit, motion and visual cues, and handling qualities. In flight, the aircraft duplicates the orbiter's atmospheric descent trajectory from approximately 35,000 feet altitude to landing on a runway. Space shuttle Discovery is scheduled to lift off on the STS-124 mission at 5:02 p.m. May 31. Photo credit: NASA/Kim Shiflett