On Launch Pad 39A at NASA's Kennedy Space Center in Florida, workers prepare to remove the seal from the Ground Umbilical Carrier Plate, or GUCP, on space shuttle Endeavour's external fuel tank. A leak of hydrogen at this location during tanking June 12 for the STS-127 mission caused the mission to be scrubbed at 12:26 a.m. June 13.Credit: NASA/Tim Jacobs
