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CAPE CANAVERAL, Fla. -- STS-135 Mission Specialist Sandy Magnus expresses her gratitude to the thousands of workers who have processed, launched and landed the space shuttles for more than three decades during an employee appreciation event. On the right is Pilot Doug Hurley. Space shuttle Atlantis' final return from space at 5:57 a.m. EDT secured the space shuttle fleet's place in history and brought a close to the STS-135 mission and America's Space Shuttle Program. STS-135 delivered spare parts, equipment and supplies to the International Space Station. STS-135 was the 33rd and final flight for Atlantis, which has spent 307 days in space, orbited Earth 4,848 times and traveled 125,935,769 miles. For more information visit, www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts135/index.html. Photo credit: NASA/Frankie Martin