CAPE CANAVERAL, Fla. -- Tugboats safely deliver NASA's Pegasus barge, carrying External Tank-138 to the turn basin at NASA's Kennedy Space Center in Florida. ET-138, the last newly manufactured tank, was originally designated to fly on Endeavour's STS-134 mission to the International Space Station, but later reassigned to fly on space shuttle Atlantis' final mission, STS-135. For information, visit www.nasa.gov_shuttle. Photo credit: NASA_Jack Pfaller
Photographer NASA_Jack Pfaller
Album STS-135