CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, STS-133 Mission Specialists Michael Barratt and Nicole Stott pause for a photo after arrival in T-38 training jets to the Shuttle Landing Facility. The STS-133 crew is at Kennedy for a practice launch dress rehearsal called the Terminal Countdown Demonstration Test (TCDT) in preparation for their upcoming mission. TCDT provides each shuttle crew and launch team with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. 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/shuttle. Photo credit: NASA/Kim Shiflett

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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, STS-133 Commander Steve Lindsey talks with Shuttle Launch Director Mike Leinbach at the Shuttle Landing Facility. The STS-133 crew members are at Kennedy for a practice launch dress rehearsal called the Terminal Countdown Demonstration Test (TCDT) in preparation for their upcoming mission. TCDT provides each shuttle crew and launch team with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. 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/shuttle. Photo credit: NASA/Kim Shiflett

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CAPE CANAVERAL, Fla. -- STS-133 Mission Specialist Tim Kopra arrives in a T-38 jet to the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. The STS-133 crew members are at Kennedy for a practice launch dress rehearsal called the Terminal Countdown Demonstration Test (TCDT) in preparation for their upcoming mission. TCDT provides each shuttle crew and launch team with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. 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/shuttle. Photo credit: NASA/Kim Shiflett

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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, STS-133 Pilot Eric Boe is greeted by Shuttle Launch Director Mike Leinbach at the Shuttle Landing Facility. The STS-133 crew members are at Kennedy for a practice launch dress rehearsal called the Terminal Countdown Demonstration Test (TCDT) in preparation for their upcoming mission. TCDT provides each shuttle crew and launch team with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. 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/shuttle. Photo credit: NASA/Kim Shiflett

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CAPE CANAVERAL, Fla. -- STS-133 Commander Steve Lindsey and Mission Specialist Tim Kopra arrive in a T-38 jet at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida. The STS-133 crew members are at Kennedy for a practice launch dress rehearsal called the Terminal Countdown Demonstration Test (TCDT) in preparation for their upcoming mission. TCDT provides each shuttle crew and launch team with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. 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/shuttle. Photo credit: NASA/Jack Pfaller

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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, STS-133 Mission Specialist Tim Kopra speaks to the media gathered for the crew’s arrival at the Shuttle Landing Facility. The STS-133 crew members are at Kennedy for a practice launch dress rehearsal called the Terminal Countdown Demonstration Test (TCDT) in preparation for their upcoming mission. TCDT provides each shuttle crew and launch team with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. 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/shuttle. Photo credit: NASA/Kim Shiflett

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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, Shuttle Launch Director Mike Leinbach greets STS-133 Mission Specialist Alvin Drew at the Shuttle Landing Facility as Pilot Eric Boe looks on. The STS-133 crew members are at Kennedy for a practice launch dress rehearsal called the Terminal Countdown Demonstration Test (TCDT) in preparation for their upcoming mission. TCDT provides each shuttle crew and launch team with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. 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/shuttle. Photo credit: NASA/Kim Shiflett

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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, STS-133 Pilot Eric Boe (left); Mission Specialists Nicole Stott, Alvin Drew and Michael Barratt greet each other after their arrival at the Shuttle Landing Facility. The STS-133 crew members are at Kennedy for a practice launch dress rehearsal called the Terminal Countdown Demonstration Test (TCDT) in preparation for their upcoming mission. TCDT provides each shuttle crew and launch team with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. 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/shuttle. Photo credit: NASA/Kim Shiflett

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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, STS-133 Mission Specialist Michael Barratt speaks to the media gathered for the crew’s arrival at the Shuttle Landing Facility. The STS-133 crew members are at Kennedy for a practice launch dress rehearsal called the Terminal Countdown Demonstration Test (TCDT) in preparation for their upcoming mission. TCDT provides each shuttle crew and launch team with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. 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/shuttle. Photo credit: NASA/Kim Shiflett

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CAPE CANAVERAL, Fla. -- On Launch Pad 39A at NASA's Kennedy Space Center STS-133 Mission Specialist Michael Barratt practices releasing a slidewire basket as part of the Terminal Countdown Demonstration Test (TCDT) pad emergency exit training. 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

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CAPE CANAVERAL, Fla. -- A NASA helicopter monitors the arrival of the STS-133 crew as they arrive in T-38 jets at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida for a practice launch dress rehearsal called the Terminal Countdown Demonstration Test (TCDT) in preparation for their upcoming mission. TCDT provides each shuttle crew and launch team with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. 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/shuttle. Photo credit: NASA/Jack Pfaller

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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, the STS-133 crew poses for a group portrait following their arrival for a practice launch dress rehearsal called the Terminal Countdown Demonstration Test (TCDT). From left are Mission Specialists Nicole Stott, Michael Barratt, Tim Kopra, Alvin Drew; Pilot Eric Boe and Commander Steve Lindsey. TCDT provides each shuttle crew and launch team with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. 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/shuttle. Photo credit: NASA/Kim Shiflett

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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, the STS-133 crew poses for a group portrait following their arrival for a practice launch dress rehearsal called the Terminal Countdown Demonstration Test (TCDT). From left are Mission Specialists Nicole Stott, Michael Barratt, Tim Kopra, Alvin Drew; Pilot Eric Boe and Commander Steve Lindsey. TCDT provides each shuttle crew and launch team with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. 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/shuttle. Photo credit: NASA/Jack Pfaller

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CAPE CANAVERAL, Fla. -- STS-133 crew members begin to arrive at the Shuttle Landing Facility at NASA's Kennedy Space Center in Florida in T-38 training jet. The crew is at Kennedy for a practice launch dress rehearsal called the Terminal Countdown Demonstration Test (TCDT) in preparation for their upcoming mission. TCDT provides each shuttle crew and launch team with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. 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/shuttle. Photo credit: NASA/Jack Pfaller

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CAPE CANAVERAL, Fla. -- At NASA's Kennedy Space Center in Florida, STS-133 Commander Steve Lindsey speaks to the media gathered for his crew’s arrival at the Shuttle Landing Facility. From left are Mission Specialists Nicole Stott, Michael Barratt; Pilot Eric Boe and Mission Specialists Tim Kopra and Alvin Drew. The STS-133 crew members are at Kennedy for a practice launch dress rehearsal called the Terminal Countdown Demonstration Test (TCDT) in preparation for their upcoming mission. TCDT provides each shuttle crew and launch team with an opportunity to participate in various simulated countdown activities, including equipment familiarization and emergency training. 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/shuttle. Photo credit: NASA/Kim Shiflett

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CAPE CANAVERAL, Fla. -- On Launch Pad 39A at NASA's Kennedy Space Center, the members of the STS-133 crew receive instruction on the operation of the pad's slidewire basket system emergency exit training as part of the Terminal Countdown Demonstration Test (TCDT). Pictured are Mission Specialist Alvin Drew (right); Pilot Eric Boe; Commander Steve Lindsey; Mission Specialists Michael Barratt, Nicole Stott and Tim Kopra. 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

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CAPE CANAVERAL, Fla. -- At Launch Pad 39A at NASA's Kennedy Space Center in Florida, members of the STS-133 crew receive instruction by the catch nets for the slidewire baskets at the base of the pad as part of the Terminal Countdown Demonstration Test (TCDT) emergency exit training. Pictured are Mission Specialist Tim Kopra (left); Pilot Eric Boe; Commander Steve Lindsey; Mission Specialists Alvin Drew, Nicole Stott and Michael Barratt. 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

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CAPE CANAVERAL, Fla. -- At Launch Pad 39A at NASA's Kennedy Space Center in Florida, the members of the STS-133 crew take time out from the Terminal Countdown Demonstration Test (TCDT) training to pose for a group portrait in the pad's White Room. From left are Mission Specialists Alvin Drew, Nicole Stott; Pilot Eric Boe; Mission Specialists Tim Kopra, 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