On Launch Pad 39A at NASA's Kennedy Space Center in Florida

2009-06-14 – On Launch Pad 39A at NASA's Kennedy Space Center in Florida, technicians prepare to change out seals from the Ground Umbilical Carrier Plate, or GUCP, on Space Shuttle Endeavour's external fuel tank. A hydrogen leak discovered during tanking on June 12 caused the STS-127 mission to be scrubbed at 12:26 a.m. on June 13. (Credit: NASA/Tim Jacobs)