CAPE CANAVERAL, Fla. -- A canister, carrying the Raffaello multi-purpose logistics module (MPLM) for space shuttle Atlantis' STS-135 mission to the International Space Station, arrives at Launch Pad 39A at NASA's Kennedy Space Center in Florida. The canister will be lifted to the payload changeout room. The payload ground-handling mechanism then will be used to transfer Raffaello out of the canister into Atlantis' payload bay. Next, the rotating service structure that protects the shuttle from the elements and provides access will be rotated back into place.Commander Chris Ferguson, Pilot Doug Hurley and Mission Specialists Sandra Magnus and Rex Walheim are targeted to lift off on Atlantis July 8, taking with them the MPLM packed with supplies, logistics and spare parts to the station. The STS-135 mission also will fly a system to investigate the potential for robotically refueling existing satellites and return a failed ammonia pump module to help NASA better understand the fai