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KENNEDY SPACE CENTER, FLA. -- During suitup for launch, STS-110 Mission Specialist Jerry L. Ross holds a camera he'll use on the mission. Ross is making a record-breaking seventh flight. STS-110 is the 13th assembly flight to the International Space Station, carrying the S0 Integrated Truss Structure and Mobile Transporter (MT). On the 11-day mission, the mission features four spacewalks to attach the S0 truss, which will become the backbone of the Space Station, to the U.S. Lab, "Destiny." The MT, a space "railcar," is attached to the truss segment and will make its debut run during the flight. Launch is scheduled for 4:40 p.m. EDT (20:40 GMT)