KENNEDY SPACE CENTER, FLA. -- In the white room on Launch Pad 39B, STS-116 Mission Specialist Joan Higginbotham is helped with her gear before entering Space Shuttle Discovery. The mission crew is taking part in a simulated launch countdown, part of the terminal countdown demonstration test that includes prelaunch preparations. The STS-116 mission is No. 20 to the International Space Station and construction flight 12A.1. The mission payload is the SPACEHAB module, the P5 integrated truss structure and other key components. Launch is scheduled for no earlier than Dec. 7. Photo credit: NASA/Amanda Diller

JSC2006-E-54411 (15 Dec. 2006) --- The members of the STS-116/12A.1 ISS Orbit 1 flight control team pose for a group portrait in the station flight control room of Houston's Mission Control Center (MCC). Flight director Derek Hassman (center right) holds the STS-116 mission logo. Astronaut Terry W. Virts Jr., spacecraft communicator (CAPCOM), is at center. PHALCON flight controller Scott Stover (center left) holds the P5 truss power reconfiguration logo.

KENNEDY SPACE CENTER, FLA. -- This fish-eye view shows the water flooding the mobile launcher platform as Space Shuttle Discovery lifts off Launch Pad 39B on mission STS-116. Liftoff occurred on time at 8:47 p.m. EST. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Tony Gray & Don Kight

KENNEDY SPACE CENTER, FLA. -- Sparks appear just prior to Space Shuttle Discovery's main engines firing approximately T-7 seconds before liftoff. Once the engines are running normally, the solid rocket boosters are ignited and the shuttle lifts off. Discovery lifted off on mission STS-116 at 8:47 p.m. EST. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo courtesy of Nikon/Scott Andrews

KENNEDY SPACE CENTER, FLA. -- STS-116 Mission Specialist Christer Fuglesang is helped by the closeout crew in the White Room to secure his launch suit before climbing into Space Shuttle Discovery. Fuglesang represents the European Space Agency. The White Room is at the end of the orbiter access arm that extends from the fixed service structure and provides entry into the orbiter. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This second launch attempt is scheduled for 8:47 p.m. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Tony Gray & Don Kight

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for a second launch attempt at 8:47 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here is Mission Specialist Nicholas Patrick, who will be making his first shuttle flight. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- STS-116 Mission Specialist Robert Curbeam thanks the closeout crew for their help in completing his suitup before climbing into Space Shuttle Discovery. The White Room is at the end of the orbiter access arm that extends from the fixed service structure and provides entry into the orbiter. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This second launch attempt is scheduled for 8:47 p.m. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Tony Gray & Don Kight

KENNEDY SPACE CENTER, FLA. -- From amid the smoke and steam, Space Shuttle Discovery leaps toward the sky past the lightning mast on Launch Pad 39B on mission STS-116. The launch occurred at 8:47:35 p.m. EST. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo courtesy of Reuters/Larry Rubenstein and Peter Jones

KENNEDY SPACE CENTER, FLA. -- Under a clear blue sky, Space Shuttle Discovery is ready for launch of mission STS-116 from Launch Pad 39B. At far left is the rotating service structure, rolled back to enable launch. Beneath Discovery's wings are the tail masts, which provide several umbilical connections to the orbiter, including a liquid-oxygen line through one and a liquid-hydrogen line through another. Seen above the golden external tank is the vent hood (known as the "beanie cap") at the end of the gaseous oxygen vent arm, extending from the FSS. Vapors are created as the liquid oxygen in the external tank boil off. The hood vents the gaseous oxygen vapors away from the space shuttle vehicle. Below it, also extending toward Discovery from the FSS, is the orbiter access arm with the White Room at the end. The crew gains access into the orbiter through the White Room. Discovery is scheduled to launch on mission STS-116 at 9:35 p.m. today. On the mission, the crew will deliver truss segment, P5, to the International Space Station and begin the intricate process of reconfiguring and redistributing the power generated by two pairs of U.S. solar arrays. The P5 will be mated to the P4 truss that was delivered and attached during the STS-115 mission in September. Photo credit: NASA/Ken Thornsley

KENNEDY SPACE CENTER, FLA. -- On the morning of the second launch attempt, Space Shuttle Discovery is revealed after rollback of the rotating service structure. Seen above the golden external tank is the vent hood (known as the "beanie cap") at the end of the gaseous oxygen vent arm, extending from the fixed service structure. Vapors are created as the liquid oxygen in the external tank boil off. The hood vents the gaseous oxygen vapors away from the space shuttle vehicle. Below it, also extending toward Discovery from the FSS, is the orbiter access arm with the White Room at the end. The crew gains access into the orbiter through the White Room. Atop the FSS is the 80-foot-tall lightning mast. To the right of the shuttle is the water tower, containing 300 gallons of water used for sound suppression at liftoff. The first launch attempt of STS-116 Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. The next launch attempt was scheduled for Saturday, Dec. 9, at 8:47 p.m. This will be Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Ken Thornsley

KENNEDY SPACE CENTER, FLA. -- A closeup of Space Shuttle Discovery at liftoff from Launch Pad 39B on mission STS-116. Liftoff occurred on time at 8:47 p.m. EST. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Jerry Cannon & Mike Kerley

KENNEDY SPACE CENTER, FLA. -- Like a shooting star flooding the night sky with its blazing light, Space Shuttle Discovery leaps toward the sky from Launch Pad 39B on mission STS-116. The launch occurred at 8:47:35 p.m. EST. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Jim Grossmann

KENNEDY SPACE CENTER, FLA. -- At liftoff from Launch Pad 39B, Space Shuttle Discovery spreads a blaze of light as it leaps into the night sky. The launch occurred at 8:47:35 p.m. EST. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for a second launch attempt at 8:47 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here is Mission Specialist Robert Curbeam, who is helped with his boot. Curbeam is making his third shuttle flight. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for a second launch attempt at 8:47 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here is Mission Specialist Robert Curbeam, who is making his third shuttle flight. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for a second launch attempt at 8:47 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here is Commander Mark Polansky, being helped with his boot. Polansky will be making his second shuttle flight. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for a second launch attempt at 8:47 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here, Mission Specialist Joan Higginbotham, who will be making her first shuttle flight, is helped with her boot. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for a second launch attempt at 8:47 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here, Mission Specialist Christer Fuglesang is helped with his boot. Fuglesang represents the European Space Agency. He is making his first shuttle flight. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In the firing room at the Launch Control Center, Shuttle Launch Director Mike Leinbach presents a memento of the night's successful launch of Space Shuttle Discovery to Kennedy Space Center Director Jim Kennedy, who is retiring in January. Behind Leinbach and Kennedy are, left to right, Deputy Director Bill Parsons, External Relations Director Lisa Malone, NASA Flow Director for Discovery Stephanie Stilson, NASA KSC News Chief Bruce Buckingham, Associate Administrator for Space Operations Mission William Gerstenmaier and NASA Administrator Mike Griffin and his wife, Becky. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- Viewed through the leaves of a tree in the foreground, the fiery liftoff of Space Shuttle Discovery on mission STS-116 lights up the nearby water. Liftoff occurred on time at 8:47 p.m. EST. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Sandy Joseph, Robert Murray & Chris Lynch

KENNEDY SPACE CENTER, FLA. -- Space Shuttle Discovery is bathed in light on Launch Pad 39B after rollback of the rotating service structure after midnight. Beneath Discovery's wings are the tail masts, which provide several umbilical connections to the orbiter, including a liquid-oxygen line through one and a liquid-hydrogen line through another. Seen above the golden external tank is the vent hood (known as the "beanie cap") at the end of the gaseous oxygen vent arm, extending from the FSS. Vapors are created as the liquid oxygen in the external tank boil off. The hood vents the gaseous oxygen vapors away from the space shuttle vehicle. Below it, also extending toward Discovery from the FSS, is the orbiter access arm with the White Room at the end. The crew gains access into the orbiter through the White Room. Discovery is scheduled to launch on mission STS-116 at 9:35 p.m. today. On the mission, the crew will deliver truss segment, P5, to the International Space Station and begin the intricate process of reconfiguring and redistributing the power generated by two pairs of U.S. solar arrays. The P5 will be mated to the P4 truss that was delivered and attached during the STS-115 mission in September. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 gather around the table for breakfast before suiting up for launch aboard Space Shuttle Discovery. From left are Mission Specialist Nicholas Patrick, Pilot William Oefelein, Mission Specialist Joan Higginbotham, Commander Mark Polansky, and Mission Specialists Sunita Williams, Robert Curbeam and Christer Fuglesang, who represents the European Space Agency. Williams will replace the International Space Station's Expedition 14 crew member Thomas Reiter, who will return to Earth aboard Discovery in her place. This is Discovery's 33rd mission and the first night launch since 2003. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- On the morning of the second launch attempt, Space Shuttle Discovery is ready on Launch Pad 39B. It is still surrounded by the rotating service structure, hiding all but the top of the external tank. On the left side is the fixed service structure, topped by the 80-foot-tall lightning mast. The first launch attempt of STS-116 Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. The next launch attempt was scheduled for Saturday, Dec. 9, at 8:47 p.m. This will be Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Ken Thornsley

KENNEDY SPACE CENTER, FLA. -- Rising on columns of fire from amid the smoke and steam below, Space Shuttle Discovery leaps toward the sky past the lightning mast on Launch Pad 39B on mission STS-116. Liftoff occurred on time at 8:47 p.m. EST. This was the second launch attempt of Discovery on mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Sandra Joseph, Robert Murray, Chris Lynch

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for a second launch attempt at 8:47 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here is Mission Specialist Robert Curbeam, after donning his helmet. Curbeam will be making his third shuttle flight. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- Space Shuttle Discovery seems to be standing on the fiery columns erupting from the solid rocket boosters as it lifts off Launch Pad 39B on mission STS-116. Liftoff occurred at 8:47 p.m. EST. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Regina Mitchell-Ryall & Tim Powers

KENNEDY SPACE CENTER, FLA. -- Under a blue sky streaked with clouds, Launch Pad 39B holds Space Shuttle Discovery, ready for launch of mission STS-116. At the far left is the rotating service structure, rolled back after midnight in preparation for launch. Next to Discovery is the fixed service structure, with the 80-foot-high lightning mast on top, part of the lightning protection system on the pad. Beneath Discovery's wings are the tail masts, which provide several umbilical connections to the orbiter, including a liquid-oxygen line through one and a liquid-hydrogen line through another. Seen above the golden external tank is the vent hood (known as the "beanie cap") at the end of the gaseous oxygen vent arm, extending from the FSS. Vapors are created as the liquid oxygen in the external tank boil off. The hood vents the gaseous oxygen vapors away from the space shuttle vehicle. Below it, also extending toward Discovery from the FSS, is the orbiter access arm with the White Room at the end. The crew gains access into the orbiter through the White Room. Discovery is scheduled to launch on mission STS-116 at 9:35 p.m. today. On the mission, the crew will deliver truss segment, P5, to the International Space Station and begin the intricate process of reconfiguring and redistributing the power generated by two pairs of U.S. solar arrays. The P5 will be mated to the P4 truss that was delivered and attached during the STS-115 mission in September. Photo credit: NASA/Ken Thornsley

KENNEDY SPACE CENTER, FLA. -- The STS-116 crew members show their eagerness for the second launch attempt as they exit the Operations and Checkout Building. Commander Mark Polansky (front at right) leads the way. Behind him are Pilot William Oefelein and Mission Specialist Christer Fuglesang, who represents the European Space Agency. On the left side, front to back are Mission Specialists Joan Higginbotham, Nicholas Patrick, Sunita Williams, and Robert Curbeam. Williams will replace Expedition 14 crew member Thomas Reiter, who will return to Earth aboard Discovery in her place. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for a second launch attempt at 8:47 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here, Mission Specialist Nicholas Patrick is ready after donning his helmet. Patrick will be making his first shuttle flight. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The fiery liftoff of Space Shuttle Discovery from Launch Pad 39B on mission STS-116 is captured in the nearby water. Liftoff occurred on time at 8:47 p.m. EST. This was the second launch attempt of Discovery on mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Sandra Joseph, Robert Murray, Chris Lynch

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for a second launch attempt at 8:47 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here, Mission Specialist Joan Higginbotham, who will be making her first shuttle flight, has donned her helmet. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- Flooding the night sky with its blazing light, Space Shuttle Discovery leaps toward the sky from Launch Pad 39B on mission STS-116. The launch occurred at 8:47:35 p.m. EST. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- On the morning of the second launch attempt, Space Shuttle Discovery is ready on Launch Pad 39B. The SCAPE vehicle (Self-Contained Atmospheric Protection Ensemble) at left contains the equipment necessary to support recovery, if necessary, including recovery crew SCAPE suits, liquid air packs, and a crew who assist recovery personnel in suiting-up in protective clothing. It is present before every launch and at every landing. The first launch attempt of STS-116 Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. The next launch attempt was scheduled for Saturday, Dec. 9, at 8:47 p.m. This will be Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Ken Thornsley

KENNEDY SPACE CENTER, FLA. -- Rising on columns of fire above the smoke and steam below, Space Shuttle Discovery leaps toward the sky past the lightning mast on Launch Pad 39B on mission STS-116. Liftoff occurred on time at 8:47 p.m. EST. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo courtesy of Nikon/Scott Andrews

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for a second launch attempt at 8:47 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here is Mission Specialist Robert Curbeam, getting help with the helmet. Curbeam will be making his third shuttle flight. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for a second launch attempt at 8:47 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Here, Commander Mark Polansky adjusts his glove. Polansky will be making his second shuttle flight. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- From amid the smoke and steam, Space Shuttle Discovery leaps toward the sky past the lightning mast on Launch Pad 39B on mission STS-116. The launch occurred at 8:47:35 p.m. EST. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo courtesy of Reuters/Larry Rubenstein and Peter Jones

KENNEDY SPACE CENTER, FLA. -- In the firing room at the Launch Control Center, Shuttle Launch Director Mike Leinbach (center, with microphone) commends the mission management team for the successful second launch attempt of Space Shuttle Discovery on mission STS-116. Liftoff occurred on time at 8:47 p.m. EST. Others in the room are (left to right), Deputy Director Bill Parsons, External Relations Director Lisa Malone, NASA Flow Director for Discovery Stephanie Stilson, NASA KSC News Chief Bruce Buckingham, Associate Administrator for Space Operations Mission William Gerstenmaier and NASA Administrator Mike Griffin. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- Flooding the night sky with its blazing light, Space Shuttle Discovery leaps toward the sky from Launch Pad 39B on mission STS-116. The launch occurred at 8:47:35 p.m. EST. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Jim Grossmann

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for a second launch attempt at 8:47 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here is Mission Specialist Christer Fuglesang, who represents the European Space Agency. Fuglesang is making his first shuttle flight. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- Under a clear blue sky, Space Shuttle Discovery is ready for launch of mission STS-116 from Launch Pad 39B. Atop the fixed service structure at left looms the 80-foot-high lightning mast, part of the lightning protection system on the pad. Beneath Discovery's wings are the tail masts, which provide several umbilical connections to the orbiter, including a liquid-oxygen line through one and a liquid-hydrogen line through another. Seen above the golden external tank is the vent hood (known as the "beanie cap") at the end of the gaseous oxygen vent arm, extending from the FSS. Vapors are created as the liquid oxygen in the external tank boil off. The hood vents the gaseous oxygen vapors away from the space shuttle vehicle. Below it, also extending toward Discovery from the FSS, is the orbiter access arm with the White Room at the end. The crew gains access into the orbiter through the White Room. Discovery is scheduled to launch on mission STS-116 at 9:35 p.m. today. On the mission, the crew will deliver truss segment, P5, to the International Space Station and begin the intricate process of reconfiguring and redistributing the power generated by two pairs of U.S. solar arrays. The P5 will be mated to the P4 truss that was delivered and attached during the STS-115 mission in September. Photo credit: NASA/Ken Thornsley

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for a second launch attempt at 8:47 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here is Mission Specialist Joan Higginbotham, who will be making her first shuttle flight. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for a second launch attempt at 8:47 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here is Pilot William Oefelein, who will be making his first shuttle flight. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- Space Shuttle Discovery is bathed in light on Launch Pad 39B after rollback of the rotating service structure after midnight. Seen above the golden external tank is the vent hood (known as the "beanie cap") at the end of the gaseous oxygen vent arm, extending from the FSS. Vapors are created as the liquid oxygen in the external tank boil off. The hood vents the gaseous oxygen vapors away from the space shuttle vehicle. Below it, also extending toward Discovery from the FSS, is the orbiter access arm with the White Room at the end. The crew gains access into the orbiter through the White Room. Discovery is scheduled to launch on mission STS-116 at 9:35 p.m. today. On the mission, the crew will deliver truss segment, P5, to the International Space Station and begin the intricate process of reconfiguring and redistributing the power generated by two pairs of U.S. solar arrays. The P5 will be mated to the P4 truss that was delivered and attached during the STS-115 mission in September. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- Flooding the night sky with light, Space Shuttle Discovery streaks through the clouds after liftoff from Launch Pad 39B on mission STS-116. The launch occurred at 8:47:35 p.m. EST. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Amanda Diller

KENNEDY SPACE CENTER, FLA. -- STS-116 Commander Mark Polansky is helped by the closeout crew in the White Room to secure his launch suit before climbing into Space Shuttle Discovery. The White Room is at the end of the orbiter access arm that extends from the fixed service structure and provides entry into the orbiter. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This second launch attempt is scheduled for 8:47 p.m. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Tony Gray & Don Kight

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for a second launch attempt at 8:47 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here is Commander Mark Polansky, who shows his delight in progressing toward another launch attempt. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- Rising on columns of fire above the smoke and steam below, Space Shuttle Discovery leaps toward the sky past the lightning mast on Launch Pad 39B on mission STS-116. Liftoff occurred at 8:47 p.m. EST. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Regina Mitchell-Ryall & Tim Powers

KENNEDY SPACE CENTER, FLA. -- The fiery liftoff of Space Shuttle Discovery from Launch Pad 39B on mission STS-116 is captured in the nearby water. Liftoff occurred on time at 8:47 p.m. EST. This was the second launch attempt of Discovery on mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Sandra Joseph, Robert Murray, Chris Lynch

KENNEDY SPACE CENTER, FLA. --Space Shuttle Discovery soars away from the fiery clouds on Launch Pad 39B on mission STS-116. The light is captured in the nearby water. Liftoff occurred on time at 8:47 p.m. EST. This was the second launch attempt of Discovery on mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Sandra Joseph, Robert Murray, Chris Lynch

KENNEDY SPACE CENTER, FLA. -- In the firing room at the Launch Control Center, Kennedy Space Center Director Jim Kennedy (with microphone) congratulates the team for successful second launch attempt of Space Shuttle Discovery on mission STS-116. Liftoff occurred on time at 8:47 p.m. EST. Others in the room are (left to right), Deputy Director Bill Parsons, External Relations Director Lisa Malone, NASA Flow Director for Discovery Stephanie Stilson, Shuttle Launch Director Mike Leinbach, Associate Administrator for Space Operations Mission William Gerstenmaier and NASA Administrator Mike Griffin. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The STS-116 crew members greet well-wishers as they head to the Astrovan that will take them to Launch Pad 39B. Leading the way, at right, is Commander Mark Polansky. The others, from left, are Mission Specialists Sunita Williams, Robert Curbeam, Nicholas Patrick, Christer Fuglesang and Joan Higginbotham; and Pilot William Oefelein. This is the second launch attempt for the crew. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for a second launch attempt at 8:47 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here is Mission Specialist Sunita Williams, who will be making her first shuttle flight. Williams will replace International Space Station Expedition 14 crew member Thomas Reiter, who will return to Earth aboard Discovery in her place. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- On the morning of the second launch attempt, Space Shuttle Discovery is ready on Launch Pad 39B. It is still surrounded by the rotating service structure, hiding all but the top of the external tank. On the left side is the fixed service structure, topped by the 80-foot-tall lightning mast. The first launch attempt of STS-116 Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. The next launch attempt was scheduled for Saturday, Dec. 9, at 8:47 p.m. This will be Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Ken Thornsley

KENNEDY SPACE CENTER, FLA. -- The fiery liftoff of Space Shuttle Discovery from Launch Pad 39B on mission STS-116 is captured in the nearby water. Liftoff occurred on time at 8:47 p.m. EST. This was the second launch attempt of Discovery on mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Sandra Joseph, Robert Murray, Chris Lynch

KENNEDY SPACE CENTER, FLA. -- Space Shuttle Discovery is bathed in light on Launch Pad 39B after rollback of the rotating service structure after midnight. Seen above the golden external tank is the vent hood (known as the "beanie cap") at the end of the gaseous oxygen vent arm, extending from the FSS. Vapors are created as the liquid oxygen in the external tank boil off. The hood vents the gaseous oxygen vapors away from the space shuttle vehicle. Below it, also extending toward Discovery from the FSS, is the orbiter access arm with the White Room at the end. The crew gains access into the orbiter through the White Room. Discovery is scheduled to launch on mission STS-116 at 9:35 p.m. today. On the mission, the crew will deliver truss segment, P5, to the International Space Station and begin the intricate process of reconfiguring and redistributing the power generated by two pairs of U.S. solar arrays. The P5 will be mated to the P4 truss that was delivered and attached during the STS-115 mission in September. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for a second launch attempt at 8:47 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Polansky is making his second shuttle flight. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for a second launch attempt at 8:47 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here is Pilot William Oefelein, being helped with his helmet. Oefelein is making his first shuttle flight. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for a second launch attempt at 8:47 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here is Mission Specialist Nicholas Patrick, who will be making his first shuttle flight, being helped with his helmet. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- While in the White Room to complete suiting up before climbing into Space Shuttle Discovery, STS-116 Mission Specialist Nicholas Patrick sends a message home. In the background is Mission Specialist Christer Fuglesang, who represents the European Space Agency. The White Room is at the end of the orbiter access arm that extends from the fixed service structure and provides entry into the orbiter. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This second launch attempt is scheduled for 8:47 p.m. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Tony Gray & Don Kight

KENNEDY SPACE CENTER, FLA. -- STS-116 Mission Specialist Sunita Williams is helped by the closeout crew in the White Room to secure her launch suit before climbing into Space Shuttle Discovery. In the foreground, back turned, is Mission Specialist Nicholas Patrick. Williams will replace International Space Station Expedition 14 crew member Thomas Reiter, who will return to Earth aboard Discovery in her place. The White Room is at the end of the orbiter access arm that extends from the fixed service structure and provides entry into the orbiter. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This second launch attempt is scheduled for 8:47 p.m. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Tony Gray & Don Kight

KENNEDY SPACE CENTER, FLA. -- STS-116 Commander William Oefelein is helped by the closeout crew in the White Room to secure his launch suit before climbing into Space Shuttle Discovery. The White Room is at the end of the orbiter access arm that extends from the fixed service structure and provides entry into the orbiter. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This second launch attempt is scheduled for 8:47 p.m. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Tony Gray & Don Kight

KENNEDY SPACE CENTER, FLA. -- The blue cones of light, known as shock or mach diamonds, beneath Space Shuttle Discovery's main engines confirm its rapid rise into the night sky after liftoff on mission STS-116. Mach diamonds are a formation of shock waves in the exhaust plume of an aerospace propulsion system. Liftoff occurred on time at 8:47 p.m. EST. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2003. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Tony Gray & Don Kight

KENNEDY SPACE CENTER, FLA. -- Space Shuttle Discovery seems to be standing on the fiery columns erupting from the solid rocket boosters as it lifts off Launch Pad 39B on mission STS-116. Liftoff occurred on time at 8:47 p.m. EST. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Regina Mitchell-Ryall & Tim Powers

KENNEDY SPACE CENTER, FLA. -- STS-116 Mission Specialist Joan Higginbotham is helped by the closeout crew in the White Room to secure her launch suit before climbing into Space Shuttle Discovery. Behind her is Mission Specialist Nicholas Patrick. The White Room is at the end of the orbiter access arm that extends from the fixed service structure and provides entry into the orbiter. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This second launch attempt is scheduled for 8:47 p.m. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Tony Gray & Don Kight

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for a second launch attempt at 8:47 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here is Sunita Williams, who will be making her first shuttle flight. Williams will replace International Space Station Expedition 14 crew member Thomas Reiter, who will return to Earth aboard Discovery in her place. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The palm tree at right is silhouetted by the blazing columns propelling Space Shuttle Discovery into the night sky on mission STS-116. Liftoff occurred on time at 8:47 p.m. EST. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Sandy Joseph, Robert Murray & Chris Lynch

KENNEDY SPACE CENTER, FLA. -- Rising on columns of fire as it emerges from behind the clouds of smoke and steam generated by its liftoff, Space Shuttle Discovery leaps toward the sky past the lightning mast on Launch Pad 39B on mission STS-116. Liftoff occurred on time at 8:47 p.m. EST. This was the second launch attempt of Discovery on mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Sandra Joseph, Robert Murray, Chris Lynch

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for a second launch attempt at 8:47 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here is Mission Specialist Nicholas Patrick, who will be making his first shuttle flight, being helped with his boot. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- Mach diamonds appear beneath Space Shuttle Discovery's main engines as the vehicle roars into the night sky after liftoff on mission STS-116. Mach diamonds are a formation of shock waves in the exhaust plume of an aerospace propulsion system. Liftoff occurred on time at 8:47 p.m. EST. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Tony Gray & Don Kight

KENNEDY SPACE CENTER, FLA. -- Emerging from behind the clouds of smoke and steam generated by its liftoff, Space Shuttle Discovery leaps toward the sky past the lightning mast on Launch Pad 39B on mission STS-116. Liftoff occurred on time at 8:47 p.m. EST. This was the second launch attempt of Discovery on mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Sandra Joseph, Robert Murray, Chris Lynch

KENNEDY SPACE CENTER, FLA. -- A large bird appears to chase Space Shuttle Discovery as it roars into space and emblazons the night sky. This was the second launch attempt of Discovery on mission STS-116. Liftoff occurred on time at 8:47 p.m. EST. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Sandra Joseph, Robert Murray, Chris Lynch

KENNEDY SPACE CENTER, FLA. -- In the firing room at the Launch Control Center, Shuttle Launch Director Mike Leinbach applauds with other NASA officials the successful second launch attempt of Space Shuttle Discovery on mission STS-116. Liftoff occurred on time at 8:47 p.m. EST. Standing left to right are NASA Flow Director for Discovery Stephanie Stilson, Leinbach, NASA KSC News Chief Bruce Buckingham, Associate Administrator for Space Operations Mission William Gerstenmaier, NASA Administrator Mike Griffin, Mrs. Griffin, and Kennedy Space Center Director Jim Kennedy. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- Under a blue sky, Space Shuttle Discovery is ready for launch of mission STS-116 from Launch Pad 39B. Beneath Discovery's wings are the tail masts, which provide several umbilical connections to the orbiter, including a liquid-oxygen line through one and a liquid-hydrogen line through another. Seen above the golden external tank is the vent hood (known as the "beanie cap") at the end of the gaseous oxygen vent arm, extending from the FSS. Vapors are created as the liquid oxygen in the external tank boil off. The hood vents the gaseous oxygen vapors away from the space shuttle vehicle. Below it, also extending toward Discovery from the FSS, is the orbiter access arm with the White Room at the end. The crew gains access into the orbiter through the White Room. Discovery is scheduled to launch on mission STS-116 at 9:35 p.m. today. On the mission, the crew will deliver truss segment, P5, to the International Space Station and begin the intricate process of reconfiguring and redistributing the power generated by two pairs of U.S. solar arrays. The P5 will be mated to the P4 truss that was delivered and attached during the STS-115 mission in September. Photo credit: NASA/Ken Thornsley

KENNEDY SPACE CENTER, FLA. -- Space Shuttle Discovery hurtles into the night sky trailing columns of fire from its solid rocket boosters as it launches on mission STS-116. Liftoff occurred on time at 8:47 p.m. EST. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Sandy Joseph, Robert Murray & Chris Lynch

KENNEDY SPACE CENTER, FLA. -- Space Shuttle Discovery seems to be standing on the fiery columns erupting from the solid rocket boosters as it lifts off Launch Pad 39B on mission STS-116. Liftoff occurred on time at 8:47 p.m. EST. This was the second launch attempt of Discovery on mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Sandra Joseph, Robert Murray, Chris Lynch

KENNEDY SPACE CENTER, FLA. -- Space Shuttle Discovery seems to be standing on the fiery columns erupting from the solid rocket boosters as it lifts off Launch Pad 39B on mission STS-116. The blazing light illuminated the launch pad and fixed service structure, at left. Liftoff occurred on time at 8:47 p.m. EST. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo courtesy of Nikon/Scott Andrews

KENNEDY SPACE CENTER, FLA. -- The smoke and steam obscure Launch Pad 39B as Space Shuttle Discovery rockets through the black skies into space on mission STS-116. Liftoff occurred at 8:47 p.m. EST. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2003. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Sandy Joseph, Robert Murray & Chris Lynch

KENNEDY SPACE CENTER, FLA. -- Mach diamonds, below left, appear beneath Space Shuttle Discovery's main engines as the vehicle roars into the night sky after liftoff on mission STS-116. Mach diamonds are a formation of shock waves in the exhaust plume of an aerospace propulsion system. Liftoff occurred on time at 8:47 p.m. EST. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Jerry Cannon & Mike Kerley

KENNEDY SPACE CENTER, FLA. -- Looking like a shooting star, Space Shuttle Discovery roars into the night sky on mission STS-116. The trailing blaze lighted the sky and nearby water, while clouds of smoke and steam billowed across the launch pad. Liftoff occurred on time at 8:47 p.m. EST. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo courtesy of Nikon/Scott Andrews

KENNEDY SPACE CENTER, FLA. -- In the firing room at the Launch Control Center, Shuttle Launch Director Mike Leinbach applauds the successful launch of Space Shuttle Discovery on mission STS-116. Liftoff occurred on time at 8:47 p.m. EST. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In the firing room, NASA officials wait for the countdown of the second launch attempt of Space Shuttle Discovery on mission STS-116. At the consoles, from left, are NASA Administrator Mike Griffin, Associate Administrator for Space Operations Mission William Gerstenmaier, Johnson Space Center Director Mike Coats, Kennedy Space Center Director Jim Kennedy and Marshall Space Flight Center Director Dave King. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 gather around the table for breakfast before suiting up for a second launch attempt aboard Space Shuttle Discovery. From left are Mission Specialist Nicholas Patrick, Pilot William Oefelein, Mission Specialist Joan Higginbotham, Commander Mark Polansky, and Mission Specialists Sunita Williams, Robert Curbeam and Christer Fuglesang, who represents the European Space Agency. Williams will replace Expedition 14 crew member Thomas Reiter, who will return to Earth aboard Discovery in her place. The first launch attempt of STS-116 Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This second launch attempt is scheduled for 8:47 p.m. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for a second launch attempt at 8:47 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here is Pilot William Oefelein, who is making his first shuttle flight. The first launch attempt of STS-116 on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The fiery liftoff of Space Shuttle Discovery from Launch Pad 39B on mission STS-116 is captured in the nearby water. Liftoff occurred on time at 8:47 p.m. EST. This was the second launch attempt for mission STS-116. The first launch attempt on Dec. 7 was postponed due a low cloud ceiling over Kennedy Space Center. This is Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 21 at KSC. Photo credit: NASA/Sandy Joseph, Robert Murray & Chris Lynch

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for launch at 9:35 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here is Mission Specialist Christer Fuglesang, who will be making his first shuttle flight. This is Discovery's 33rd mission and the first night launch since 2003. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA_Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- STS-116 Pilot William Oefelein is suited and ready to begin practice flights on the shuttle training aircraft (STA) two days before launch. The STA is a Grumman American Aviation-built Gulf Stream II jet that was modified to simulate an orbiter's cockpit, motion and visual cues, and handling qualities. In flight, the STA duplicates the orbiter's atmospheric descent trajectory from approximately 35,000 feet altitude to landing on a runway. Because the orbiter is unpowered during re-entry and landing, its high-speed glide must be perfectly executed the first time. Launch of Space Shuttle Discovery on mission STS-116 is scheduled for 9:35 p.m. Dec. 7. On the mission, the STS-116 crew will deliver truss segment, P5, to the International Space Station and begin the intricate process of reconfiguring and redistributing the power generated by two pairs of U.S. solar arrays. The P5 will be mated to the P4 truss that was delivered and attached during the STS-115 mission in September. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The launch attempt of STS-116 was postponed due a low cloud ceiling over Kennedy Space Center. The next launch attempt was scheduled for Saturday, Dec. 9, at 8:47 p.m. In the photo, the rotating service structure has been rolled into place around the shuttle. This will be Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Ken Thornsley

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for launch at 9:35 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here is Pilot William Oefelein, who will be making his first shuttle flight. This is Discovery's 33rd mission and the first night launch since 2003. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The launch attempt of STS-116 was postponed due a low cloud ceiling over Kennedy Space Center. The next launch attempt was scheduled for Saturday, Dec. 9, at 8:47 p.m. In the photo, the rotating service structure has been rolled into place around the shuttle. This will be Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Ken Thornsley

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for launch at 9:35 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here is Commander Mark Polansky, being helped with his boot. Polansky will be making his second shuttle flight. This is Discovery's 33rd mission and the first night launch since 2003. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- Fuel trucks head for Launch Pad 39B to refill the external tank on Space Shuttle Discovery. The top of the external tank can be seen above the rotating service structure that encloses the space shuttle. The launch attempt of Discovery on mission STS-116 was postponed Dec. 7 due a low cloud ceiling over Kennedy Space Center. The next launch attempt was scheduled for Saturday, Dec. 9, at 8:47 p.m. This will be Discovery's 33rd mission and the first night launch since 2002. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Ken Thornsley

KENNEDY SPACE CENTER, FLA. -- Following orbiter landing practice in the shuttle training aircraft (STA), STS-116 Pilot William Oefelein gives a final check to his launch suit. Launch of Space Shuttle Discovery on mission STS-116 is scheduled for 9:35 p.m. Dec. 7. On the mission, the STS-116 crew will deliver truss segment, P5, to the International Space Station and begin the intricate process of reconfiguring and redistributing the power generated by two pairs of U.S. solar arrays. The P5 will be mated to the P4 truss that was delivered and attached during the STS-115 mission in September. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for launch at 9:35 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here is Commander Mark Polansky, after donning his helmet. Polansky will be making his second shuttle flight. This is Discovery's 33rd mission and the first night launch since 2003. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for launch at 9:35 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here is Mission Specialist Robert Curbeam, after donning his helmet. Curbeam will be making his third shuttle flight. This is Discovery's 33rd mission and the first night launch since 2003. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- Following orbiter landing practice in the shuttle training aircraft (STA), STS-116 Pilot William Oefelein adjusts his helmet during suit fit-check. Launch of Space Shuttle Discovery on mission STS-116 is scheduled for 9:35 p.m. Dec. 7. On the mission, the STS-116 crew will deliver truss segment, P5, to the International Space Station and begin the intricate process of reconfiguring and redistributing the power generated by two pairs of U.S. solar arrays. The P5 will be mated to the P4 truss that was delivered and attached during the STS-115 mission in September. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for launch at 9:35 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here is Pilot William Oefelein, who signals his helmet is working. Oefelein is making his first shuttle flight. This is Discovery's 33rd mission and the first night launch since 2003. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for launch at 9:35 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here, Mission Specialist Joan Higginbotham is helped with her helmet. Higginbotham will be making her first shuttle flight. This is Discovery's 33rd mission and the first night launch since 2003. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The crew members of mission STS-116 are suiting up for launch at 9:35 p.m. EST from Launch Pad 39B aboard Space Shuttle Discovery. Pictured here is Mission Specialist Nicholas Patrick, who will be making his first shuttle flight, being helped with his helmet. This is Discovery's 33rd mission and the first night launch since 2003. The 20th shuttle mission to the International Space Station, STS-116 carries another truss segment, P5. It will serve as a spacer, mated to the P4 truss that was attached in September. After installing the P5, the crew will reconfigure and redistribute the power generated by two pairs of U.S. solar arrays. Landing is expected Dec. 19 at KSC. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The shuttle training aircraft (STA), with STS-116 Commander Mark Polansky in the pilot's seat, taxis to the runway of the Shuttle Landing Facility. Polansky will be practicing landing the orbiter. The STA is a Grumman American Aviation-built Gulf Stream II jet that was modified to simulate an orbiter's cockpit, motion and visual cues, and handling qualities. In flight, the STA duplicates the orbiter's atmospheric descent trajectory from approximately 35,000 feet altitude to landing on a runway. Because the orbiter is unpowered during re-entry and landing, its high-speed glide must be perfectly executed the first time. Launch of Space Shuttle Discovery on mission STS-116 is scheduled for 9:35 p.m. Dec. 7. On the mission, the STS-116 crew will deliver truss segment, P5, to the International Space Station and begin the intricate process of reconfiguring and redistributing the power generated by two pairs of U.S. solar arrays. The P5 will be mated to the P4 truss that was delivered and attached during the STS-115 mission in September. Photo credit: NASA/Kim Shiflett