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The crew of the STS-89 mission, scheduled for launch Jan. 22 aboard the Space Shuttle Endeavour from pad 39A at Kennedy Space Center (KSC), participated in the Terminal Countdown Demonstration Test (TCDT) at KSC. Simulating the walk-out from the Operations and Checkout Building before entering a van to take them to the launch pad are (front to back, left to right) Pilot Joe Edwards Jr.; Commander Terrence Wilcutt; and Mission Specialists Bonnie Dunbar, Ph.D., Michael Anderson, Salizhan Sharipov of the Russian Space Agency, Andrew Thomas, Ph.D., and James Reilly, Ph.D. The TCDT is held at KSC prior to each Space Shuttle flight to provide the crew of each mission with an opportunity to participate in simulated countdown activities. The TCDT ends with a mock launch countdown culminating in a simulated main engine cut-off. The crew also spends time undergoing emergency egress training exercises at the pad and has an opportunity to view and inspect the payloads in the orbiter's payload bay KSC-98pc132
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The crew of the STS-89 mission, scheduled for launch Jan. 22 aboard the Space Shuttle Endeavour from pad 39A at Kennedy Space Center (KSC), participated in the Terminal Countdown Demonstration Test (TCDT) at KSC. Simulating the walk-out from the Operations and Checkout Building before entering a van to take them to the launch pad are (front to back, left to right) Pilot Joe Edwards Jr.; Commander Terrence Wilcutt; and Mission Specialists Bonnie Dunbar, Ph.D., Michael Anderson, Salizhan Sharipov of the Russian Space Agency, Andrew Thomas, Ph.D., and James Reilly, Ph.D. The TCDT is held at KSC prior to each Space Shuttle flight to provide the crew of each mission with an opportunity to participate in simulated countdown activities. The TCDT ends with a mock launch countdown culminating in a simulated main engine cut-off. The crew also spends time undergoing emergency egress training exercises at the pad and has an opportunity to view and inspect the payloads in the orbiter's payload bay
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.
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