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KENNEDY SPACE CENTER, FLA. - In the Space Station Processing Facility, the multi-purpose logistics module Leonardo is moved by crane across the building to the payload transportation canister for transfer to Launch Pad 39B. At the pad, the module will be installed in Space Shuttle Discovery's payload bay. Part of the payload for mission STS-121, Leonardo carries tons of supplies and experiments for the International Space Station and its crew. Discovery is scheduled to be launched in a window that extends from July 1 to July 19. Photo credit: NASA/Kim Shiflett