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STS-115 Mission Specialist Heidemarie Stefanyshyn-Piper talks to workers in the Space Station Processing Facility. She and other crew members are at KSC for hardware familiarization. The mission will deliver the second port truss segment, the P3/P4 Truss, to attach to the first port truss segment, the P1 Truss, as well as deploy solar array sets 2A and 4A.. The crew is scheduled to activate and check out the Solar Alpha Rotary Joint (SARJ) and deploy the P4 Truss radiator.