CAPE CANAVERAL, Fla. – In the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida, external fuel tank ET-131 is suspended by a crane over the transfer aisle. It will be lifted into the upper levels and lowered into a checkout bay. ET-131 will be used on space shuttle Endeavour's STS-127 mission. Payload for the mission is the Japanese Experiment Module's Experiment Logistics Module-Exposed Section, or ELM-ES. Launch is targeted for June. Photo credit: NASA/Kim Shiflett KSC-2009-1820

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.