Mission Specialist Alvin Drew is suited up in the Operations and Checkout Building at NASA's Kennedy Space Center.

STS-133 Mission Specialist Alvin Drew is suited up in the Operations and Checkout Building at NASA's Kennedy Space Center in Florida during a simulated launch countdown. Checking the fit of their orange launch-and-entry suits and helmets before launch day is part of the Terminal Countdown Demonstration Test (TCDT), which provides each shuttle crew and launch team an opportunity to participate in various simulated activities, including equipment familiarization and emergency training at the launch pad.

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