STS-133 crew members pose for a photo in Launch Pad 39A's White Room during the Terminal Countdown Demonstration Test TCDT.

At NASA's Kennedy Space Center in Florida, STS-133 crew members pose for a photo in Launch Pad 39A's White Room during the Terminal Countdown Demonstration Test (TCDT). From left are Mission Specialists Nicole Stott, Alvin Drew, Pilot Eric Boe, Mission Specialists Tim Kopra and Michael Barratt, and Commander Steve Lindsey.

TCDT provides each shuttle crew and launch team an opportunity to participate in various simulated activities, including equipment familiarization and a launch countdown. Space 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/Kim Shiflett