A view of the launch of Space Shuttle Atlantis on mission STS-115 as it soars over the Space Coast.

A view of the launch of Space Shuttle Atlantis on mission STS-115 as it soars over the Space Coast, taken from NASA's WB-57 aircraft. Atlantis is heading for a rendezvous with the International Space Station, delivering the 17.5-ton, bus-sized P3/P4 integrated truss segment for installation. Liftoff was on-time at 11:14:55 a.m. EDT. After several launch attempts were scrubbed due to weather and technical concerns, this launch was executed perfectly. The girder-like truss includes a set of giant solar arrays, batteries and associated electronics and will provide one-fourth of the total power-generation capability for the completed station. STS-115 is scheduled to last 11 days with a planned landing at KSC. Photo credit: Courtesy of Robert Rivers