The crew members are in the pad's White Room preparing to board space shuttle Discovery during the Terminal Countdown Demonstration Test TCDT.

As the sun begins to rise at Launch Pad 39A at NASA's Kennedy Space Center in Florida, the STS-133 crew members are in the pad's White Room preparing to board space shuttle Discovery during the Terminal Countdown Demonstration Test (TCDT). Part of TCDT includes practicing the final hours of a real launch day when astronauts put on their launch-and-entry suits, ride to the pad in the Astrovan and strap into the shuttle.

Discovery and its STS-133 crew will deliver the Permanent Multipurpose Module, packed with supplies and critical spare parts, as well as Robonaut 2, the dexterous humanoid astronaut helper, to the International Space Station. Launch is targeted for Nov. 1 at 4:40 p.m. For more information on the STS-133 mission, visit www.nasa.gov/mission_pages/shuttle/shuttlemissions/sts133/. Photo credit: NASA/Jim Grossmann