Out of clouds of smoke and steam, space shuttle Discovery hurtles toward space on the 23rd assembly mission to the International Space Station. Photo credit: NASA/Debbie Odom.
The STS-120 crew members wave to spectators as they head for NASA's Astrovan that will take them to Launch Pad 39A. Leading the way at right is Commander Pamela Melroy. Photo credit: NASA/Kim Shiflett