Aug 1 1988
From The Space Library
A Wet Countdown Demonstration Test (WCDT) of the Space Shuttle Discovery's External Tank (ET) was conducted following several unplanned holds as a result of problems with ground support equipment. The WCDDT, carried out with Discovery deployed for launch at the Kennedy Space Center's Launch Complex 39-B, consisted of loading the ET with liquid Oxygen and Liquid Hydrogen in mock preparation for a Shuttle launch. (NASA STS-26 Press Kit)
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