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CAPE CANAVERAL, Fla. – In the Space Station Processing Facility at NASA's Kennedy Space Center, STS-119 Mission Specialists Joseph Acaba, left, and Richard Arnold inspect hardware slated to fly on their upcoming space shuttle mission. On the STS-119 mission, space shuttle Discovery will carry the S6 truss segment to complete the 361-foot-long backbone of the International Space Station. The truss includes the fourth pair of solar array wings and electronics that convert sunlight to power for the orbiting laboratory. Launch is targeted for Feb. 12, 2009. Photo credit: NASA/Kim Shiflett