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KENNEDY SPACE CENTER, FLA. - Tug boats maneuver the Pegasus barge next to the dock in the turn basin at the Launch Complex 39 Area. The barge holds the redesigned external fuel tank, seen inside, that will launch Space Shuttle Atlantis on the next shuttle mission, STS-115. The tank, designated ET-118, was shipped from the Michoud Assembly Facility in New Orleans. After off-loading, the tank will be moved into the Vehicle Assembly Building and lifted into a checkout cell for further work. The tank will fly with many major safety changes, including the removal of the protuberance air load ramps. Photo credit: NASA/Kim Shiflett