NASA特色图片：发现号航天飞机矗立在发射台上

Space Shuttle Discovery stands on the launch pad

At NASA's Kennedy Space Center in Florida, space shuttle Discovery waits on Launch Pad 39A

on Nov. 5, 2010 for its STS-133 launch to the International Space Station. Managers

scrubbed the Nov. 5 launch attempt because a hydrogen gas leak was detected at the Ground

Umbilical Carrier Plate while Discovery's external fuel tank was being filled.
资料来源：http://www.nasa.gov/multimedia/imagegallery/image_feature_1797.html