KSC-84PC-476 (For release Aug. 29, 1984) --- Orbiter Discovery is poised on Launch Pad 39A as the sun sets the evening prior to its maiden launch. Space shuttle Discovery (STS-41D) was successfully launched at 8:41 a.m. Aug. 30, 1984, after two failed attempts in June. Carrying a crew of six astronauts and three satellites, Discovery is the third in NASA?s stable of four Space Transportation System orbiters. The six-person crew includes Commander Henry Hartsfield, Pilot Michael Coats, Mission Specialists Judith Resnik, Mike Mullane and Steve Hawley and the first commercial payload specialist, Charles Walker of McDonnell Douglas. Photo credit: NASA ksc-84pc-476

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.