English: CAPE CANAVERAL, Fla. – A "towback" vehicle slowly pulls space shuttle Atlantis toward the open door of Orbiter Processing Facility-2 at NASA's Kennedy Space Center in Florida. A purge unit that pumps conditioned air into a shuttle after landing is connected to Atlantis' aft end. Once inside the processing facility, Atlantis will be prepared for future public display at Kennedy's Visitor Complex. Atlantis' final return from space at 5:57 a.m. EDT concluded the STS-135 mission, secured the space shuttle fleet's place in history and brought a close to America's Space Shuttle Program. Main gear touchdown was at 5:57:00 a.m. EDT, followed by nose gear touchdown at 5:57:20 a.m., and wheelstop at 5:57:54 a.m. On board were STS-135 Commander Chris Ferguson, Pilot Doug Hurley, and Mission Specialists Sandra Magnus and Rex Walheim. On the 37th shuttle mission to the International Space Station, STS-135 delivered the Raffaello multi-purpose logistics module filled with more than 9,400 pounds of spare parts, equipment and supplies that will sustain station operations for the next year. 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, and also the final mission of the Space Shuttle Program. For more information, visit http://www.nasa.gov/mission_pages/shuttle/flyout.