CAPE CANAVERAL, Fla. – In Orbiter Processing Facility-2 at NASA’s Kennedy Space Center in Florida, technicians monitor the progress as a large crane lifts and moves the forward reaction control system (FRCS) for installation on space shuttle Endeavour. The work is part of the Space Shuttle Program transition and retirement processing of Endeavour. The FRCS helped maneuver a shuttle while it was in orbit. The FRCS was removed from Endeavour and sent to White Sands Test Facility in N.M. to be cleaned of its toxic propellants. Endeavour is being prepared for display at the California Science Center in Los Angeles. Photo credit: NASA/Dimitri Gerondidakis KSC-2012-1274

The Space Shuttle program was the United States government's manned launch vehicle program from 1981 to 2011, administered by NASA and officially beginning in 1972. The Space Shuttle system—composed of an orbiter launched with two reusable solid rocket boosters and a disposable external fuel tank— carried up to eight astronauts and up to 50,000 lb (23,000 kg) of payload into low Earth orbit (LEO). When its mission was complete, the orbiter would re-enter the Earth's atmosphere and lands as a glider. Although the concept had been explored since the late 1960s, the program formally commenced in 1972 and was the focus of NASA's manned operations after the final Apollo and Skylab flights in the mid-1970s. It started with the launch of the first shuttle Columbia on April 12, 1981, on STS-1. and finished with its last mission, STS-135 flown by Atlantis, in July 2011.