The crew of mission STS-115 arrives at NASA Kennedy Space Center's Shuttle Landing Facility to prepare for launch to the International Space Station.

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. Seen here is Mission Specialist Daniel Burbank, who will be making his second flight on the shuttle. 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