STS135-S-214 (21 July 2011) --- The final four astronauts of NASA's Space Shuttle Program stand proudly in front of space shuttle Atlantis, the remarkable spacecraft that took them on the STS-135 mission to the International Space Station. From right, are NASA astronauts Chris Ferguson, commander; Doug Hurley, pilot; Sandy Magnus and Rex Walheim, both mission specialists. The crew returned to Earth on the Shuttle Landing Facility's Runway 15 at NASA's Kennedy Space Center in Florida at 5:57 a.m. (EDT) on July 21, 2011. Atlantis' final return from space completed a 13-day, 5.2-million-mile journey to the International Space Station. STS-135 delivered spare parts, equipment and supplies in the Raffaello multi-purpose logistics module 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.