(03/23/2002) -- On the launch pad, the payload canister with the S0 Integrated Truss Structure is lifted up the Rotating Service Structure to the payload changeout room for transfer to Space Shuttle Atlantis's payload bay. Part of the payload on mission STS-110, the S0 truss will become the backbone of the orbiting International Space Station (ISS). The S0 truss will be attached to the U.S. Lab, 'Destiny,' on the 11-day mission. Launch is scheduled for April 4