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KENNEDY SPACE CENTER, FLA. - Secure on the back of a transport vehicle, the MESSENGER spacecraft is being transferred to a hazardous processing facility where the spacecraft’s complement of hypergolic propellants will be loaded. MESSENGER is scheduled to launch Aug. 2 aboard a Boeing Delta II rocket from Pad 17-B, Cape Canaveral Air Force Station, Fla., bound for Mercury. The spacecraft is expected to reach orbit around Mercury in March 2011. MESSENGER was built for NASA by the Johns Hopkins University Applied Physics Laboratory in Laurel, Md.