KENNEDY SPACE CENTER, FLA. - The orbiter Discovery, atop an orbiter transporter, reaches its destination, the transfer aisle of NASA's Vehicle Assembly Building (VAB). The rollover to the VAB marks the start of the journey to the launch pad and, ultimately, launch. After the slings of the overhead crane are in place, Discovery will be raised to vertical and lifted up and over into high bay 3 for stacking with its redesigned external tank and twin solid rocket boosters. The rollout of Space Shuttle Discovery to Launch Pad 39B is expected in approximately a week. Launch of Discovery on mission STS-121 is scheduled to take place in a window extending July 1 to July 19. Photo credit: NASA/Jack Pfaller KSC-06pd0829

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KENNEDY SPACE CENTER, FLA. -- After a 15-day mission to the International Space Station, space shuttle Discovery approaches Runway 33 of the Shuttle Landing Facility at NASA's Kennedy Space Center to complete mission STS-120. Main gear touchdown was 1:01:16 p.m. Wheel stop was at 1:02:07 p.m. Mission elapsed time was 15 days, 2 hours, 24 minutes and 2 seconds. During the mission, the STS-120 crew continued the construction of the station with the installation of the Harmony Node 2 module and the relocation of the P6 truss. Photo credit: NASA/Scott Haun, Tom Farrar, Raphael Hernandez KSC-07pp3244

CAPE CANAVERAL, Fla. – A team of aerospace workers accompanies space shuttle Discovery along the towway to the Shuttle Landing Facility, or SLF, at NASA’s Kennedy Space Center in Florida. At the SLF, Discovery will be hoisted onto a Shuttle Carrier Aircraft, or SCA, with the aid of a mate-demate device. The SCA, a modified Boeing 747 jet airliner, is scheduled to ferry Discovery to the Washington Dulles International Airport in Virginia on April 17, after which the shuttle will be placed on permanent public display in the Smithsonian's National Air and Space Museum Steven F. Udvar-Hazy Center. For more information on shuttle transition and retirement activities, visit http://www.nasa.gov/transition. Photo credit: NASA/Tim Jacobs KSC-2012-2068

STS-119 - EOM - Public domain NASA photogrpaph

STS-124 - LAUNCH - Public domain NASA photogrpaph

KENNEDY SPACE CENTER, Fla. -- Completing mission STS-105, orbiter Discovery and its crew drop through scattered clouds to land on KSC's Shuttle Landing Facility runway 15. Discovery trails its drag chute that helps slow the orbiter. Main gear touchdown was at 2:22:58 p.m. EDT, wheel stop at 2:24:06 p.m. EDT. The 11-day, 21-hour, 12-minute mission accomplished the goals set for the 11th flight to the International Space Station: swapout of the resident Station crew, delivery of equipment supplies and scientific experiments, and installation of the Early Ammonia Servicer and heater cables for the S0 truss on the Station. Discovery traveled 4.3 million miles on its 30th flight into space, the 106th mission of the Space Shuttle program. The landing was the first out of five in 2001to occur in daylight at KSC KSC01padig272

STS-127 - Public domain NASA photogrpaph

KENNEDY SPACE CENTER, FLA. - The orbiter Discovery, atop an orbiter transporter, reaches its destination, the transfer aisle of NASA's Vehicle Assembly Building (VAB). The rollover to the VAB marks the start of the journey to the launch pad and, ultimately, launch. After the slings of the overhead crane are in place, Discovery will be raised to vertical and lifted up and over into high bay 3 for stacking with its redesigned external tank and twin solid rocket boosters. The rollout of Space Shuttle Discovery to Launch Pad 39B is expected in approximately a week. Launch of Discovery on mission STS-121 is scheduled to take place in a window extending July 1 to July 19. Photo credit: NASA/Jack Pfaller KSC-06pd0829

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KENNEDY SPACE CENTER, FLA. - The orbiter Discovery, atop an orbiter transporter, reaches its destination, the transfer aisle of NASA's Vehicle Assembly Building (VAB). The rollover to the VAB marks the start of the journey to the launch pad and, ultimately, launch. After the slings of the overhead crane are in place, Discovery will be raised to vertical and lifted up and over into high bay 3 for stacking with its redesigned external tank and twin solid rocket boosters. The rollout of Space Shuttle Discovery to Launch Pad 39B is expected in approximately a week. Launch of Discovery on mission STS-121 is scheduled to take place in a window extending July 1 to July 19. Photo credit: NASA/Jack Pfaller

Space Shuttle Program

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.