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KENNEDY SPACE CENTER, FLA. - The crew of mission STS-115 arrives at NASA Kennedy Space Center's Shuttle Landing Facility to prepare for launch on Aug. 27 to the International Space Station. They have paused to talk to the media before heading to crew quarters in the Operations and Checkout Building. From left are Mission Specialists Steven MacLean, Joseph Tanner and Heidemarie Stefanyshyn-Piper, Commander Brent Jett, Pilot Christopher Ferguson and Mission Specialist Daniel Burbank. MacLean represents the Canadian Space Agency. The mission will deliver and install the 17-and-a-half-ton P3/P4 truss segment to the port side of the integrated truss system on the orbital outpost. The truss includes a new set of photovoltaic solar arrays. When unfurled to their full length of 240 feet, the arrays will provide additional power for the station in preparation for the delivery of international science modules over the next two years. STS-115 is expected to last 11 days and includes three scheduled spacewalks. Photo credit: NASA/Kim Shiflett