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Uploaded on Nov 14, 2010
At NASA's Kennedy Space Center in Florida, technicians at Launch Pad 39A began disconnecting space shuttle Discovery's ground umbilical carrier plate (GUCP) on Nov. 9 by unhooking and lowering the hydrogen vent line that attaches to the plate on the external fuel tank. As the disconnection process continues, they will take a careful step-by-step look and assess repair options. On Nov. 5, Discovery's launch was postponed until at least Nov. 30 because of a hydrogen gas leak at the GUCP, which is an attachment point between the external tank and a pipe that carries excess hydrogen safely away from Discovery to a flare stack, where it is burned off.