CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, the STS-133 crew members walk through the Vehicle Assembly Building. From left are Mission Specialists Michael Barratt and Nicole Stott, Commander Steve Lindsey, Mission Specialists Alvin Drew and Tim Kopra, and Pilot Eric Boe. The astronauts are at Kennedy for 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 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

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, shuttle Discovery pauses for photos during its move called "rollover" from Orbiter Processing Facility-3 to the nearby Vehicle Assembly Building (VAB). Behind and to the left of Discovery is NASA's new 355-foot-tall mobile launcher support structure. Once inside the VAB, the shuttle will be joined to its solid rocket boosters and external fuel tank. Later, Discovery will "roll out" to Launch Pad 39A for its launch to the International Space Station on the STS-133 mission. Targeted to liftoff Nov. 1, Discovery will take the Permanent Multipurpose Module (PMM) packed with supplies and critical spare parts, as well as Robonaut 2 (R2) to the station. Photo credit: NASA/Ben Cooper

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, shuttle Discovery is ushered into the Vehicle Assembly Building (VAB) from Orbiter Processing Facility-3 during a move known as "rollover." Once inside the VAB, the shuttle will be joined to its solid rocket boosters and external fuel tank. Later, Discovery will "roll out" to Launch Pad 39A for its launch to the International Space Station on the STS-133 mission. Targeted to liftoff Nov. 1, Discovery will take the Permanent Multipurpose Module (PMM) packed with supplies and critical spare parts, as well as Robonaut 2 (R2) to the station. Photo credit: NASA/Ben Cooper

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, workers in the Vehicle Assembly Building begin to secure a large yellow, metal sling to shuttle Discovery for its lift from the transfer aisle into High Bay 3. In the bay, the shuttle will be attached to its external fuel tank and solid rocket boosters. The operation began Sept. 9 and wrapped up early Sept. 10. Later, Discovery will "roll out" to Launch Pad 39A in preparation for its launch to the International Space Station on the STS-133 mission. Targeted to liftoff Nov. 1, Discovery will take the Permanent Multipurpose Module (PMM) packed with supplies and critical spare parts, as well as Robonaut 2 (R2) to the station. Photo credit: NASA/Ben Cooper

CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, shuttle Discovery is ushered into the Vehicle Assembly Building (VAB) from Orbiter Processing Facility-3 during a move known as "rollover." Once inside the VAB, the shuttle will be joined to its solid rocket boosters and external fuel tank. Later, Discovery will "roll out" to Launch Pad 39A for its launch to the International Space Station on the STS-133 mission. Targeted to liftoff Nov. 1, Discovery will take the Permanent Multipurpose Module (PMM) packed with supplies and critical spare parts, as well as Robonaut 2 (R2) to the station. Photo credit: NASA/Ben Cooper