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KENNEDY SPACE CENTER, FLA. -- The payload canister containing the first section of the Japan Aerospace Exploration Agency's Kibo laboratory and the Canadian Space Agency's two-armed robotic system, Dextre, moves toward Launch Pad 39A at NASA's Kennedy Space Center. At the pad the payload will be transferred to the payload changeout room, part of the rotating service structure. The changeout room is the enclosed, environmentally controlled portion of the rotating service structure that supports cargo delivery to the pad and subsequent vertical installation into an orbiter's payload bay. The payload will be installed into Endeavour for launch on the STS-123 mission targeted for March 11. Photo credit: NASA/Kim Shiflett