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KENNEDY SPACE CENTER, FLA. - Workers inside the payload canister watch the S1 Integrated Truss Structure as it is lowered toward them. The canister will transport the truss to Atlantis. The first starboard truss segment, the S1 will be attached to the Central truss segment, the S0 Truss, on the International Space Station during mission STS-112. Atlantis is scheduled to launch no earlier than Oct. 2.