A special event honoring the crew of space shuttle mission STS-118 was held at Walt Disney World. Here, visitors enjoy the NASA display at Epcot's Innoventions Center. The event also honored teacher-turned-astronaut Barbara R. Morgan, who dedicated a plaque outside the Mission: Space attraction. Other activities included meeting with the media and students and a parade down Main Street. Mission STS-118 was the 119th shuttle program flight and the 22nd flight to the International Space Station. Space shuttle Endeavour launched from NASA's Kennedy Space Center on Aug. 8 and landed Aug. 21. The mission delivered the S5 truss, continuing the assembly of the space station.

At Walt Disney World in Orlando, the crew members of space shuttle mission STS-118 answer questions from the student audience during a special event to honor the Endeavour crew. Seated from left are Mission Specialists Alvin Drew, Barbara R. Morgan, Dave Williams, Rick Mastracchio and Tracy Caldwell; Pilot Charlie Hobaugh; and Commander Scott Kelly. The event also honored teacher-turned-astronaut Morgan, who dedicated a plaque outside the Mission: Space attraction. Other activities included meeting with the media and a parade down Main Street. Mission STS-118 was the 119th shuttle program flight and the 22nd flight to the International Space Station. Space shuttle Endeavour launched from NASA's Kennedy Space Center on Aug. 8 and landed Aug. 21. The mission delivered the S5 truss, continuing the assembly of the space station.

A reporter interviews STS-118 Mission Specialist Dave Williams during a special event at Walt Disney World in Orlando . The day's events honoring the STS-118 space shuttle crew recognized the inspirational achievement of teacher-turned-astronaut Barbara R. Morgan who helped dedicate a plaque outside the Mission: Space attraction, and included meeting with students and the media and parading down Main Street to the delight of the crowds. The other crew members attending were Commander Scott Kelly, Pilot Charlie Hobaugh and Mission Specialists Tracy Caldwell, Rick Mastracchio and Alvin Drew. Mission STS-118 was the 119th shuttle program flight and the 22nd flight to the International Space Station. Space shuttle Endeavour launched from NASA's Kennedy Space Center on Aug. 8 and landed Aug. 21. The mission delivered the S5 truss, continuing the assembly of the space station

Members of the space shuttle mission STS-118 crew march down Main Street at Walt Disney World in Orlando. From left are Mission Specialists Alvin Drew, Barbara R. Morgan and Dave Williams, Pilot Charlie Hobaugh, Mission Specialist Tracy Caldwell and Commander Scott Kelly. Not pictured but present is Mission Specialist Rick Mastracchio. The event also honored teacher-turned-astronaut Morgan, who dedicated a plaque outside the Mission: Space attraction. Other activities included meeting with the media and students. Mission STS-118 was the 119th shuttle program flight and the 22nd flight to the International Space Station. Space shuttle Endeavour launched from NASA's Kennedy Space Center on Aug. 8 and landed Aug. 21. The mission delivered the S5 truss, continuing the assembly of the space station.

NASA's Kennedy Space Center Education Specialists Linda Scauzillo and Christopher Blair take part in a special education session with local students at Epcot's Base21 Siemens VIP Center. The event was part of the day's activities honoring the space shuttle Endeavour crew of mission STS-118. The crew met with the media and paraded down Main Street. The event also honored teacher-turned-astronaut Barbara R. Morgan, who dedicated a plaque outside the Mission: Space attraction. The other crew members attending were Commander Scott Kelly, Pilot Charlie Hobaugh and Mission Specialists Tracy Caldwell, Dave Williams, Rick Mastracchio and Alvin Drew. Mission STS-118 was the 119th shuttle program flight and the 22nd flight to the International Space Station. Space shuttle Endeavour launched from NASA's Kennedy Space Center on Aug. 8 and landed Aug. 21. The mission delivered the S5 truss, continuing the assembly of the space station.

Enroute to the International Space Station (ISS), Space Shuttle Endeavor and its seven member STS-118 crew, blasted off from the launch pad at Kennedy Space Center on August 8, 2007. Construction resumed on the ISS as STS-118 mission specialists and the Expedition 15 crew completed installation of the third Starboard 5 (S-5) truss segment, removed a faulty Control Moment Gyroscope (CMG-3), installed a new CMG into the Z1 truss, relocated the S-band Antenna Sub-Assembly from the Port 6 (P6) to Port 1 (P1) truss, installed a new transponder on P1, retrieved the P6 transponder, and delivered roughly 5,000 pounds of equipment and supplies.

Enroute to the International Space Station (ISS), Space Shuttle Endeavor and its seven member STS-118 crew, blasted off from the launch pad at Kennedy Space Center on August 8, 2007. Construction resumed on the ISS as STS-118 mission specialists and the Expedition 15 crew completed installation of the third Starboard 5 (S-5) truss segment, removed a faulty Control Moment Gyroscope (CMG-3), installed a new CMG into the Z1 truss, relocated the S-band Antenna Sub-Assembly from the Port 6 (P6) to Port 1 (P1) truss, installed a new transponder on P1, retrieved the P6 transponder, and delivered roughly 5,000 pounds of equipment and supplies.

KENNEDY SPACE CENTER, Fla. -- STS-118 Commander Scott Kelly stands inside an M-113 armored personnel carrier before his driving session as part of emergency exit training. He and other crew members are at Kennedy for the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. TCDT activities include the M-113 training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- STS-118 Commander Scott Kelly practices driving an M-113 armored personnel carrier with fellow crew members Tracy Caldwell, Alvin Drew and Dave Williams, all mission specialists, as passengers. They are at Kennedy for the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. TCDT activities include the M-113 training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. NASA/George Shelton

Enroute to the International Space Station (ISS), Space Shuttle Endeavor and its seven member STS-118 crew, blasted off from the launch pad at Kennedy Space Center on August 8, 2007. Construction resumed on the ISS as STS-118 mission specialists and the Expedition 15 crew completed installation of the third Starboard 5 (S-5) truss segment, removed a faulty Control Moment Gyroscope (CMG-3), installed a new CMG into the Z1 truss, relocated the S-band Antenna Sub-Assembly from the Port 6 (P6) to Port 1 (P1) truss, installed a new transponder on P1, retrieved the P6 transponder, and delivered roughly 5,000 pounds of equipment and supplies.

These seven astronauts take a break from training to pose for the STS-118 crew portrait. Pictured from the left are astronauts Richard A. “Rick” Mastracchio, mission specialist; Barbara R. Morgan, mission specialist; Charles O. Hobaugh, pilot; Scott J. Kelly, commander; Tracy E. Caldwell, Canadian Space Agency's Dafydd R. “Dave” Williams, and Alvin Drew Jr., all mission specialists. The crew members are attired in training versions of their shuttle launch and entry suits. The main objective of the STS-118 mission was to install the fifth Starboard (S5) truss segment on the International Space Station (ISS).

KENNEDY SPACE CENTER, Fla. -- STS-118 Pilot Charlie Hobaugh stands inside an M-113 armored personnel carrier before his driving session as part of emergency exit training. He and other crew members are at Kennedy for the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. TCDT activities include the M-113 training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- STS-118 Mission Specialist Alvin Drew stands inside an M-113 armored personnel carrier before his driving session, as part of emergency exit training. He and other crew members are at Kennedy for the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. TCDT activities include the M-113 training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- STS-118 Pilot Charlie Hobaugh practices driving an M-113 armored personnel carrier with passenger (at left) Tracy Caldwell, mission specialist. They and other crew members are at Kennedy for the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. TCDT activities include the M-113 training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. NASA/George Shelton

KENNEDY SPACE CENTER, FLA. - In high bay 3 of the Vehicle Assembly Building, a United Space Alliance worker attaches external tank No. 118 to one of the solid rocket boosters on the mobile launcher platform. The stack is designated to fly on mission STS-115 with Atlantis. ET-118 will fly with many major safety changes, including the removal of the protuberance air load ramps. The mission will deliver the second port truss segment, the P3/P4 Truss, to attach to the first port truss segment, the P1 Truss, as well as deploy solar array set 2A and 4A. Launch of Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Jim Grossmann

KENNEDY SPACE CENTER, FLA. - In high bay 3 of the Vehicle Assembly Building, external tank No. 118 has been lowered between the twin solid rocket boosters on the mobile launcher platform. The stack is designated to fly on mission STS-115 with Atlantis. ET-118 will fly with many major safety changes, including the removal of the protuberance air load ramps. The mission will deliver the second port truss segment, the P3/P4 Truss, to attach to the first port truss segment, the P1 Truss, as well as deploy solar array set 2A and 4A. Launch of Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Jim Grossmann

KENNEDY SPACE CENTER, FLA. - In high bay 3 of the Vehicle Assembly Building, external tank No. 118 is lowered between the twin solid rocket boosters on the mobile launcher platform. The stack is designated to fly on mission STS-115 with Atlantis. ET-118 will fly with many major safety changes, including the removal of the protuberance air load ramps. The mission will deliver the second port truss segment, the P3/P4 Truss, to attach to the first port truss segment, the P1 Truss, as well as deploy solar array set 2A and 4A. Launch of Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Jim Grossmann

KENNEDY SPACE CENTER, FLA. -- The STS-118 crew arrives at Kennedy Space Center's Shuttle Landing Facility to prepare for launch on Aug. 8 aboard Space Shuttle Endeavour. Seen here is Mission Specialist Barbara Morgan, NASA's first educator astronaut. Endeavour's STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5. Other payloads include the SPACEHAB module, making its last voyage, and the external stowage platform 3 with a control moment gyroscope on it. The flight will include at least three spacewalks. The crew will also debut a new system that enables docked shuttles to draw electrical power from the station to extend visits to the outpost. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, Fla. -- STS-118 Mission Specialist Barbara R. Morgan practices driving an M-113 armored personnel carrier as part of emergency exit training. Seen in the back, at left, are Commander Scott Kelly and Mission Specialists Tracy Caldwell and Alvin Drew. Morgan joined NASA's Teacher in Space program in 1985 and was selected as an astronaut in 1998. She and other crew members are at Kennedy for the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. TCDT activities include the M-113 training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- The STS-118 crew arrives at Kennedy Space Center's Shuttle Landing Facility to prepare for launch on Aug. 8 aboard Space Shuttle Endeavour. From left are Commander Scott Kelly, Pilot Charlie Hobaugh, and Mission Specialists Tracy Caldwell, Rick Mastracchio, Dave Williams (with the Canadian Space Agency), Barbara Morgan and Alvin Drew. Endeavour's STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5. Other payloads include the SPACEHAB module, making its last voyage, and the external stowage platform 3 with a control moment gyroscope on it. The flight will include at least three spacewalks. The crew will also debut a new system that enables docked shuttles to draw electrical power from the station to extend visits to the outpost. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, Fla. -- STS-118 Mission Specialist Alvin Drew practices driving an M-113 armored personnel carrier, with (at right) Mission Specialists Barbara R. Morgan and Dave Williams as passengers. Morgan joined NASA's Teacher in Space program in 1985 and was selected as an astronaut in 1998. Williams represents the Canadian Space Agency. They and other crew members are at Kennedy for the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. TCDT activities include the M-113 training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- The STS-118 crew arrives at Kennedy Space Center's Shuttle Landing Facility to prepare for launch on Aug. 8 aboard Space Shuttle Endeavour. Seen here is Mission Specialist Alvin Drew as he talks to the media. Endeavour's STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5. Other payloads include the SPACEHAB module, making its last voyage, and the external stowage platform 3 with a control moment gyroscope on it. The flight will include at least three spacewalks. The crew will also debut a new system that enables docked shuttles to draw electrical power from the station to extend visits to the outpost. NASA/Kim Shiflett

KENNEDY SPACE CENTER, Fla. -- STS-118 Mission Specialist Tracy Caldwell is ready to take her turn at driving an M-113 armored personnel carrier as part of emergency exit training. Seen behind her at right is Mission Specialist Dave Williams, who represents the Canadian Space Agency. They and other crew members are at Kennedy for the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. TCDT activities include the M-113 training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- The STS-118 crew arrives at Kennedy Space Center's Shuttle Landing Facility to prepare for launch on Aug. 8 aboard Space Shuttle Endeavour. Seen here is Mission Specialist Dave Williams, with the Canadian Space Agency. Endeavour's STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5. Other payloads include the SPACEHAB module, making its last voyage, and the external stowage platform 3 with a control moment gyroscope on it. The flight will include at least three spacewalks. The crew will also debut a new system that enables docked shuttles to draw electrical power from the station to extend visits to the outpost. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The STS-118 crew arrives at Kennedy Space Center's Shuttle Landing Facility to prepare for launch on Aug. 8 aboard Space Shuttle Endeavour. Seen here is Mission Specialist Tracy Caldwell as she talks to the media. Endeavour's STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5. Other payloads include the SPACEHAB module, making its last voyage, and the external stowage platform 3 with a control moment gyroscope on it. The flight will include at least three spacewalks. The crew will also debut a new system that enables docked shuttles to draw electrical power from the station to extend visits to the outpost. NASA/Kim Shiflett

KENNEDY SPACE CENTER, Fla. -- Inside an M-113 armored personnel carrier, the STS-118 crew gets instructions on its use for emergency exit procedures from Launch Pad 39A. At left is Mission Specialist Dave Williams, who represents the Canadian Space Agency. At right are (back to front) Pilot Charlie Hobaugh and Mission Specialists Alvin Drew and Tracy Caldwell. TCDT activities include the M-113 training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- STS-118 Mission Specialist Rick Mastracchio practices driving an M-113 armored personnel carrier as part of emergency exit training. The astronauts seen behind him are Mission Specialists Alvin Drew, Barbara R. Morgan, Dave Williams (standing) and Tracy Caldwell. Morgan joined NASA's Teacher in Space program in 1985 and was selected as an astronaut in 1998. Williams represents the Canadian Space Agency. The crew is at Kennedy for the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. TCDT activities include the M-113 training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- STS-118 Mission Specialist Tracy Caldwell practices driving an M-113 armored personnel carrier as part of emergency exit training. Seen in the back are Mission Specialist Alvin Drew, Pilot Charlie Hobaugh and educator astronaut and Mission Specialist Barbara R. Morgan. They and other crew members are at Kennedy for the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. TCDT activities include the M-113 training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- STS-118 Mission Specialist Dave Williams, who represents the Canadian Space Agency, signals success after driving an M-113 armored personnel carrier as part of emergency exit training. Behind him are, at left, Pilot Charlie Hobaugh and, right, Mission Specialist Tracy Caldwell. They and other crew members are at Kennedy for the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. TCDT activities include the M-113 training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- STS-118 Mission Specialist Rick Mastracchio gets ready to practice driving an M-113 armored personnel carrier as part of emergency exit training. Behind him, at right, is Mission Specialist Tracy Caldwell. They and other crew members are at Kennedy for the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. TCDT activities include the M-113 training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- The STS-118 crew arrives at Kennedy Space Center's Shuttle Landing Facility to prepare for launch on Aug. 8 aboard Space Shuttle Endeavour. Seen here is Mission Specialist Rick Mastracchio as he talks to media representatives. Endeavour's STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5. Other payloads include the SPACEHAB module, making its last voyage, and the external stowage platform 3 with a control moment gyroscope on it. The flight will include at least three spacewalks. The crew will also debut a new system that enables docked shuttles to draw electrical power from the station to extend visits to the outpost. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, Fla. -- STS-118 Mission Specialist Barbara R. Morgan is ready to practice driving an M-113 armored personnel carrier as part of emergency exit training. Behind her at the rear are Mission Specialists (left) Tracy Caldwell and Dave Williams. Morgan joined NASA's Teacher in Space program in 1985 and was selected as an astronaut in 1998. She and other crew members are at Kennedy for the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. TCDT activities include the M-113 training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- STS-118 Commander Scott Kelly practices driving an M-113 armored personnel carrier, as part of emergency exit training, with fellow crew members aboard. Behind Kelly is Mission Specialist Barbara R. Morgan. The crew is at Kennedy for the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. TCDT activities include the M-113 training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- STS-118 Mission Specialist Dave Williams, who represents the Canadian Space Agency, gets ready to practice driving an M-113 armored personnel carrier as part of emergency exit training. Behind him is Mission Specialist Barbara R. Morgan. They and other crew members are at Kennedy for the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. TCDT activities include the M-113 training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- The STS-118 crew arrives at Kennedy Space Center's Shuttle Landing Facility to prepare for launch on Aug. 8 aboard Space Shuttle Endeavour. Seen here is Pilot Charlie Hobaugh. Endeavour's STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5. Other payloads include the SPACEHAB module, making its last voyage, and the external stowage platform 3 with a control moment gyroscope on it. The flight will include at least three spacewalks. The crew will also debut a new system that enables docked shuttles to draw electrical power from the station to extend visits to the outpost. NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - STS-118 Pilot Charlie Hobaugh is satisfied with his training session in the shuttle training aircraft, or STA, at the Shuttle Landing Facility, Kennedy Space Center's airstrip. He and STS-118 Commander Scott Kelly were at the facility to practice landings for their upcoming mission. 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. Endeavour's STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5. Other payloads include the SPACEHAB module, making its last voyage, and the external stowage platform 3 with a control moment gyroscope on it. The flight will include at least three spacewalks. The crew will also debut a new system that enables docked shuttles to draw electrical power from the station to extend visits to the outpost. Launch is set for Aug. 8 at 6:36 p.m. EDT. NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - STS-118 Pilot Charlie Hobaugh disembarks from the shuttle training aircraft, or STA, at the Shuttle Landing Facility, Kennedy Space Center's airstrip. He and STS-118 Commander Scott Kelly were at the facility to practice landings for their upcoming mission. 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. Endeavour's STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5. Other payloads include the SPACEHAB module, making its last voyage, and the external stowage platform 3 with a control moment gyroscope on it. The flight will include at least three spacewalks. The crew will also debut a new system that enables docked shuttles to draw electrical power from the station to extend visits to the outpost. Launch is set for Aug. 8 at 6:36 p.m. EDT. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - STS-118 Commander Scott Kelly is satisfied with his training session in the shuttle training aircraft, or STA, at the Shuttle Landing Facility, Kennedy Space Center's airstrip. He and STS-118 Pilot Charlie Hobaugh were at the facility to practice landings for their upcoming mission. 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. Endeavour's STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5. Other payloads include the SPACEHAB module, making its last voyage, and the external stowage platform 3 with a control moment gyroscope on it. The flight will include at least three spacewalks. The crew will also debut a new system that enables docked shuttles to draw electrical power from the station to extend visits to the outpost. Launch is set for Aug. 8 at 6:36 p.m. EDT. NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - STS-118 Commander Scott Kelly disembarks from the shuttle training aircraft, or STA, at the Shuttle Landing Facility, Kennedy Space Center's airstrip. He and STS-118 Pilot Charlie Hobaugh were at the facility to practice landings for their upcoming mission. 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. Endeavour's STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5. Other payloads include the SPACEHAB module, making its last voyage, and the external stowage platform 3 with a control moment gyroscope on it. The flight will include at least three spacewalks. The crew will also debut a new system that enables docked shuttles to draw electrical power from the station to extend visits to the outpost. Launch is set for Aug. 8 at 6:36 p.m. EDT. NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In the Operations and Checkout Building during suitup, STS-118 Mission Specialist Barbara R. Morgan, teacher-turned-astronaut, is eager to make her first spaceflight on mission STS-118 aboard Space Shuttle Endeavour. The STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5, and other payloads such as the SPACEHAB module and the external stowage platform 3. The 11-day mission may be extended to as many as 14 depending on the test of the Station-to-Shuttle Power Transfer System that will allow the docked shuttle to draw electrical power from the station and extend its visits to the orbiting lab. NASA/Kim Shiflett

KENNEDY SPACE CENTER, Fla. -- After completing their driving training on the M-113 armored personnel carrier (behind them), the STS-118 crew take a break. From left are Mission Specialists Dave Williams and Rick Mastracchio, Commander Scott Kelly, Mission Specialist Barbara R. Morgan, Pilot Charlie Hobaugh, and Mission Specialists Alvin Drew and Tracy Caldwell. Williams represents the Canadian Space Agency. Morgan joined NASA's Teacher in Space program in 1985 and was selected as an astronaut in 1998. The crew is at Kennedy for the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. TCDT activities include the M-113 training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- The STS-118 crew arrives at Kennedy Space Center's Shuttle Landing Facility to prepare for launch on Aug. 8 aboard Space Shuttle Endeavour. Commander Scott Kelly addresses media representatives. From left, behind him are Pilot Charlie Hobaugh and Mission Specialists Tracy Caldwell, Rick Mastracchio, Dave Williams (with the Canadian Space Agency), Barbara Morgan (NASA's first educator astronaut) and Alvin Drew. Endeavour's STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5. Other payloads include the SPACEHAB module, making its last voyage, and the external stowage platform 3 with a control moment gyroscope on it. The flight will include at least three spacewalks. The crew will also debut a new system that enables docked shuttles to draw electrical power from the station to extend visits to the outpost. NASA/Kim Shiflett

Back dropped by the colorful Earth, the International Space Station (ISS) boasts its newest configuration upon the departure of Space Shuttle Endeavor and STS-118 mission. Days earlier, construction resumed on the ISS as STS-118 mission specialists and the Expedition 15 crew completed installation of the Starboard 5 (S-5) truss segment, removed a faulty Control Moment Gyroscope (CMG-3), installed a new CMG into the Z1 truss, relocated the S-band Antenna Sub-Assembly from the Port 6 (P6) to Port 1 (P1) truss, installed a new transponder on P1, retrieved the P6 transponder, and delivered roughly 5,000 pounds of supplies.

KENNEDY SPACE CENTER, FLA. -- In the Operations and Checkout Building, STS-118 Commander Scott Kelly dons his launch and entry suit for launch aboard Space Shuttle Endeavour. This is Kelly's second spaceflight. The STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5, and other payloads such as the SPACEHAB module and the external stowage platform 3. The 11-day mission may be extended to as many as 14 depending on the test of the Station-to-Shuttle Power Transfer System that will allow the docked shuttle to draw electrical power from the station and extend its visits to the orbiting lab. NASA/Kim Shiflett

Back dropped by the blue Earth, the International Space Station (ISS) boasts its newest configuration upon the departure of Space Shuttle Endeavor and STS-118 mission. Days earlier, construction resumed on the ISS as STS-118 mission specialists and the Expedition 15 crew completed installation of the Starboard 5 (S-5) truss segment, removed a faulty Control Moment Gyroscope (CMG-3), installed a new CMG into the Z1 truss, relocated the S-band Antenna Sub-Assembly from the Port 6 (P6) to Port 1 (P1) truss, installed a new transponder on P1, retrieved the P6 transponder, and delivered roughly 5,000 pounds of equipment and supplies.

KENNEDY SPACE CENTER, FLA. -- In the Operations and Checkout Building, STS-118 Mission Specialist Tracy Caldwell is helped with her helmet during suitup for launch on Space Shuttle Endeavour. The STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5, and other payloads such as the SPACEHAB module and the external stowage platform 3. The 11-day mission may be extended to as many as 14 depending on the test of the Station-to-Shuttle Power Transfer System that will allow the docked shuttle to draw electrical power from the station and extend its visits to the orbiting lab. NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In the Operations and Checkout Building, STS-118 Pilot Charlie Hobaugh is ready after suitup to head for the launch pad and board Space Shuttle Endeavour. The STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5, and other payloads such as the SPACEHAB module and the external stowage platform 3. The 11-day mission may be extended to as many as 14 depending on the test of the Station-to-Shuttle Power Transfer System that will allow the docked shuttle to draw electrical power from the station and extend its visits to the orbiting lab. NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In the Operations and Checkout Building, STS-118 Mission Specialist Alvin Drew is helped with his helmet during suitup for launch on Space Shuttle Endeavour. The STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5, and other payloads such as the SPACEHAB module and the external stowage platform 3. The 11-day mission may be extended to as many as 14 depending on the test of the Station-to-Shuttle Power Transfer System that will allow the docked shuttle to draw electrical power from the station and extend its visits to the orbiting lab. NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - External tank No. 118 waits in the Vehicle Assembly Building for a crane to be attached that will raise it to vertical and lifted into high bay 3 for mating with solid rocket boosters stacked there. The tank is designated to fly on mission STS-115 with Atlantis. It will fly with many major safety changes, including the removal of the protuberance air load ramps. The mission will deliver the second port truss segment, the P3/P4 Truss, to attach to the first port truss segment, the P1 Truss, as well as deploy solar array set 2A and 4A. Launch of Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Jim Grossmann

KENNEDY SPACE CENTER, FLA. - In the Vehicle Assembly Building, external tank No. 118 is lifted off its transporter before being raised to vertical and into high bay 3 for mating with solid rocket boosters stacked there. The tank is designated to fly on mission STS-115 with Atlantis. It will fly with many major safety changes, including the removal of the protuberance air load ramps. The mission will deliver the second port truss segment, the P3/P4 Truss, to attach to the first port truss segment, the P1 Truss, as well as deploy solar array set 2A and 4A. Launch of Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Jim Grossmann

KENNEDY SPACE CENTER, FLA. - In the Vehicle Assembly Building, external tank No. 118 is lifted off its transporter before being raised to vertical and into high bay 3 for mating with solid rocket boosters stacked there. The tank is designated to fly on mission STS-115 with Atlantis. It will fly with many major safety changes, including the removal of the protuberance air load ramps. The mission will deliver the second port truss segment, the P3/P4 Truss, to attach to the first port truss segment, the P1 Truss, as well as deploy solar array set 2A and 4A. Launch of Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Jim Grossmann

KENNEDY SPACE CENTER, FLA. - External tank No. 118 is suspended over the transfer aisle of the Vehicle Assembly Building before being raised to vertical and into high bay 3 for mating with solid rocket boosters stacked there. The tank is designated to fly on mission STS-115 with Atlantis. It will fly with many major safety changes, including the removal of the protuberance air load ramps. The mission will deliver the second port truss segment, the P3/P4 Truss, to attach to the first port truss segment, the P1 Truss, as well as deploy solar array set 2A and 4A. Launch of Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Jim Grossmann

KENNEDY SPACE CENTER, FLA. - In the Vehicle Assembly Building, external tank No. 118 is suspended vertically above the transfer aisle. The tank will be lifted into high bay 3 for mating with solid rocket boosters stacked there. The tank is designated to fly on mission STS-115 with Atlantis. It will fly with many major safety changes, including the removal of the protuberance air load ramps. The mission will deliver the second port truss segment, the P3/P4 Truss, to attach to the first port truss segment, the P1 Truss, as well as deploy solar array set 2A and 4A. Launch of Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Jim Grossmann

KENNEDY SPACE CENTER, FLA. - In the Vehicle Assembly Building, a crane begins raising the head of external tank No. 118 so that the tank is suspended vertically. The tank will be lifted into high bay 3 for mating with solid rocket boosters stacked there. The tank is designated to fly on mission STS-115 with Atlantis. It will fly with many major safety changes, including the removal of the protuberance air load ramps. The mission will deliver the second port truss segment, the P3/P4 Truss, to attach to the first port truss segment, the P1 Truss, as well as deploy solar array set 2A and 4A. Launch of Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Jim Grossmann

KENNEDY SPACE CENTER, FLA. - In the Vehicle Assembly Building, external tank No. 118 is suspended vertically above the transfer aisle. The tank will be lifted into high bay 3for mating with solid rocket boosters stacked there. The tank is designated to fly on mission STS-115 with Atlantis. It will fly with many major safety changes, including the removal of the protuberance air load ramps. The mission will deliver the second port truss segment, the P3/P4 Truss, to attach to the first port truss segment, the P1 Truss, as well as deploy solar array set 2A and 4A. Launch of Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Jim Grossmann

KENNEDY SPACE CENTER, FLA. - Workers in the Vehicle Assembly Building attach a crane to external tank No. 118 in order to raise it vertical and lift it into high bay 3 for mating with solid rocket boosters stacked there. The tank is designated to fly on mission STS-115 with Atlantis. It will fly with many major safety changes, including the removal of the protuberance air load ramps. The mission will deliver the second port truss segment, the P3/P4 Truss, to attach to the first port truss segment, the P1 Truss, as well as deploy solar array set 2A and 4A. Launch of Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Jim Grossmann

KENNEDY SPACE CENTER, FLA. - A worker in the Vehicle Assembly Building attaches a crane to external tank No. 118 in order to raise it vertical and lift it into high bay 3 for mating with solid rocket boosters stacked there. The tank is designated to fly on mission STS-115 with Atlantis. It will fly with many major safety changes, including the removal of the protuberance air load ramps. The mission will deliver the second port truss segment, the P3/P4 Truss, to attach to the first port truss segment, the P1 Truss, as well as deploy solar array set 2A and 4A. Launch of Space Shuttle Atlantis is scheduled for late August. Photo credit: NASA/Jim Grossmann

As the construction continued on the International Space Station (ISS), STS-118 Astronaut Rick Mastracchio and Canada Space Agency's Dave Williams (out of frame), participated in the first session of Extra Vehicular Activity (EVA) for the mission. During the 6 hour, 17 minute space walk, the two attached the Starboard 5 (S5) segment of truss, retracted the forward heat rejecting radiator from the Port 6 (P6) truss, and performed several get ahead tasks.

As the construction continued on the International Space Station (ISS), STS-118 Astronaut Rick Mastracchio and Canada Space Agency representative Dave Williams (out of frame), participated in the first session of Extra Vehicular Activity (EVA) for the mission. During the 6 hour, 17 minute space walk, the two attached the Starboard 5 (S5) segment of truss, retracted the forward heat rejecting radiator from the Port 6 (P6) truss, and performed several get ahead tasks.

As the construction continued on the International Space Station (ISS), STS-118 Astronaut Rick Mastracchio and Canada Space Agency's Dave Williams (out of frame), participated in the first session of Extra Vehicular Activity (EVA) for the mission. During the 6 hour, 17 minute space walk, the two attached the Starboard 5 (S5) segment of truss, retracted the forward heat rejecting radiator from the Port 6 (P6) truss, and performed several get ahead tasks.

KENNEDY SPACE CENTER, FLA. -- In the Operations and Checkout Building, STS-118 Mission Specialist Alvin Drew reflects on the auspicious moment of suiting up for launch. Drew is making his first spaceflight when Space Shuttle Endeavour launches on mission STS-120. Space Shuttle Endeavour's STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5, and other payloads such as the SPACEHAB module and the external stowage platform 3. The 11-day mission may be extended to as many as 14 depending on the test of the Station-to-Shuttle Power Transfer System that will allow the docked shuttle to draw electrical power from the station and extend its visits to the orbiting lab. NASA/Kim Shiflett

JSC2007-E-44418 (22 Aug. 2007) --- Astronaut Scott Kelly, STS-118 commander, addresses a large crowd of well-wishers at the STS-118 crew return ceremony on Wednesday, Aug. 22 in Ellington Field's Hangar 990 near JSC.

Tracy E. Caldwell, STS-118 astronaut and mission specialist, participates in a training session on the usage of a special device, used to lower oneself from a troubled shuttle, in the Space Vehicle Mockup Facility at the Johnson Space Center. Caldwell is wearing a training version of her shuttle launch and entry suit.

KENNEDY SPACE CENTER, Fla. -- The STS-118 crew gets instructions on emergency exit procedures from Launch Pad 39A. From left are Mission Specialist Rick Mastracchio, Pilot Charlie Hobaugh, Mission Specialist Alvin Drew, Commander Scott Kelly, and Mission Specialists Tracy Caldwell, Dave Williams and Barbara R. Morgan, whojoined NASA's Teacher in Space program in 1985. She was selected as an astronaut in 1998. TCDT activities include the M-113 training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- The STS-118 crew arrives at Kennedy's Shuttle Landing Facility aboard a Shuttle Training Aircraft to take part in the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. From left are Mission Specialists Barbara R. Morgan, Dave Williams and Rick Mastracchio. Williams represents the Canadian Space Agency. Morgan joined NASA's Teacher in Space program in 1985 and was selected as an astronaut in 1998. TCDT activities include M-113 armored personnel carrier training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. Photo credit: NASA/Ken Thornsley

KENNEDY SPACE CENTER, FLA. -- The STS-118 crew waves to spectators as they head for the Astrovan. From left are Mission Specialists Alvin Drew, Barbara R. Morgan, Dave Williams and Rick Mastracchio, Pilot Charlie Hobaugh, Mission Specialist Tracy Caldwell and Commander Scott Kelly. The Astrovan will take them to Launch Pad 39A for final suit preparations before climbing into Space Shuttle Endeavour for launch at 6:36 p.m. EDT. The STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5, and other payloads such as the SPACEHAB module and the external stowage platform 3. The 11-day mission may be extended to as many as 14 depending on the test of the Station-to-Shuttle Power Transfer System that will allow the docked shuttle to draw electrical power from the station and extend its visits to the orbiting lab. NASA/Kim Shiflett

KENNEDY SPACE CENTER, Fla. -- The STS-118 crew arrives at Kennedy's Shuttle Landing Facility aboard a Shuttle Training Aircraft to take part in the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. From left are Mission Specialist Barbara R. Morgan, Commander Scott Kelly and Mission Specialist Alvin Drew. Morgan joined NASA's Teacher in Space program in 1985 and was selected as an astronaut in 1998. DT activities include M-113 armored personnel carrier training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. Photo credit: NASA/Ken Thornsley

KENNEDY SPACE CENTER, FLA. - Space Shuttle Endeavour is revealed on Launch Pad 39A after rollback of the rotating service structure, or RSS, at left of the pad. Rollback started at 9 p.m. EDT Aug. 7 and was complete at 10:40 p.m. Beneath the shuttle is the mobile launcher platform. The RSS provides protected access to the orbiter for changeout and servicing of payloads at the pad. Rollback of the pad's RSS is one of the milestones in preparation for the launch of mission STS-118 at 6:36 p.m. EDT on Aug. 8. Space Shuttle Endeavour's STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5, and other payloads such as the SPACEHAB module and the external stowage platform 3. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, Fla. -- The STS-118 crew arrives at Kennedy's Shuttle Landing Facility aboard a Shuttle Training Aircraft to take part in the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. From left are Mission Specialist Barbara R. Morgan, Commander Scott Kelly and Mission Specialist Alvin Drew. Morgan joined NASA's Teacher in Space program in 1985 and was selected as an astronaut in 1998. TCDT activities include M-113 armored personnel carrier training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. Photo credit: NASA/Ken Thornsley

KENNEDY SPACE CENTER, Fla. -- The STS-118 crew arrives at Kennedy's Shuttle Landing Facility aboard a Shuttle Training Aircraft to take part in the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. From left are Mission Specialists Alvin Drew; Barbara R. Morgan; Dave Williams, representing the Canadian Space Agency; Rick Mastracchio; Tracy Caldwell; Pilot Charlie Hobaugh and Commander Scott Kelly. Morgan joined NASA's Teacher in Space program in 1985 and was selected as an astronaut in 1998. TCDT activities include M-113 armored personnel carrier training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- The STS-118 crew arrives at Kennedy's Shuttle Landing Facility aboard a Shuttle Training Aircraft to take part in the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. Shuttle Launch Director Mike Leinbach (left) welcomes Mission Specialists Tracy Caldwell, Rick Mastracchio and Dave Williams of the Canadian Space Agency, as Commander Scott Kelly (back to camera) looks on. TCDT activities include M-113 armored personnel carrier training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- The STS-118 crew enjoys a traditional meal before suiting up for launch. Seated left to right are Mission Specialists Alvin Drew and Dave Williams, Pilot Charlie Hobaugh, Commander Scott Kelly, and Mission Specialists Tracy Caldwell, Rick Mastracchio and Barbara R. Morgan, the teacher-turned-astronaut. Space Shuttle Endeavour's STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5, and other payloads such as the SPACEHAB module and the external stowage platform 3. The 11-day mission may be extended to as many as 14 depending on the test of the Station-to-Shuttle Power Transfer System that will allow the docked shuttle to draw electrical power from the station and extend its visits to the orbiting lab. NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In the Operations and Checkout Building, STS-118 Mission Specialist Rick Mastracchio is helped with his helmet during suitup before launch aboard Space Shuttle Endeavour. Mastracchio is making his second spaceflight. The STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5, and other payloads such as the SPACEHAB module and the external stowage platform 3. The 11-day mission may be extended to as many as 14 depending on the test of the Station-to-Shuttle Power Transfer System that will allow the docked shuttle to draw electrical power from the station and extend its visits to the orbiting lab. NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In the Operations and Checkout Building, STS-118 Commander Scott Kelly completes suitup with his helmet. Kelly is eager for liftoff aboard Space Shuttle Endeavour, scheduled at 6:36 p.m. EDT. The STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5, and other payloads such as the SPACEHAB module and the external stowage platform 3. The 11-day mission may be extended to as many as 14 depending on the test of the Station-to-Shuttle Power Transfer System that will allow the docked shuttle to draw electrical power from the station and extend its visits to the orbiting lab. NASA/Kim Shiflett

KENNEDY SPACE CENTER, Fla. -- The STS-118 crew arrives at Kennedy's Shuttle Landing Facility aboard a Shuttle Training Aircraft to take part in the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. Mission Specialist Barbara R. Morgan, NASA's first educator astronaut, acknowledges those who have turned out to welcome them. TCDT activities include M-113 armored personnel carrier training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. Photo credit: NASA/Ken Thornsley

KENNEDY SPACE CENTER, FLA. -- In the Operations and Checkout Building, STS-118 Mission Specialist Tracy Caldwell is helped donning her launch and entry suit before heading to Launch Pad 39A and launch of Space Shuttle Endeavour at 6:36 p.m. EDT. Endeavour's STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5, and other payloads such as the SPACEHAB module and the external stowage platform 3. The 11-day mission may be extended to as many as 14 depending on the test of the Station-to-Shuttle Power Transfer System that will allow the docked shuttle to draw electrical power from the station and extend its visits to the orbiting lab. NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - Space Shuttle Endeavour is revealed on Launch Pad 39A after rollback of the rotating service structure, or RSS, at left of the pad. Rollback started at 9 p.m. EDT Aug. 7 and was complete at 10:40 p.m. Beneath the shuttle is the mobile launcher platform which supports the shuttle until liftoff. The RSS provides protected access to the orbiter for changeout and servicing of payloads at the pad. Rollback of the pad's RSS is one of the milestones in preparation for the launch of mission STS-118 at 6:36 p.m. EDT on Aug. 8. Space Shuttle Endeavour's STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5, and other payloads such as the SPACEHAB module and the external stowage platform 3. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - After rollback of the rotating service structure, or RSS, on Launch Pad 39A, Space Shuttle Endeavour stands bathed in spotlights. Rollback started at 9 p.m. EDT Aug. 7 and was complete at 10:40 p.m. Beneath the shuttle is the mobile launcher platform which supports the shuttle until liftoff. The RSS provides protected access to the orbiter for changeout and servicing of payloads at the pad. Rollback of the pad's RSS is one of the milestones in preparation for the launch of mission STS-118 at 6:36 p.m. EDT on Aug. 8. Space Shuttle Endeavour's STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5, and other payloads such as the SPACEHAB module and the external stowage platform 3. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In the Operations and Checkout Building, STS-118 Mission Specialist Dave Williams is helped adjusting his helmet as he suits up for launch. Williams, who is making his second spaceflight, represents the Canadian Space Agency. Space Shuttle Endeavour's STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5, and other payloads such as the SPACEHAB module and the external stowage platform 3. The 11-day mission may be extended to as many as 14 depending on the test of the Station-to-Shuttle Power Transfer System that will allow the docked shuttle to draw electrical power from the station and extend its visits to the orbiting lab. NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- The STS-118 crew arrives at Kennedy's Shuttle Landing Facility aboard a Shuttle Training Aircraft to take part in the Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. Shuttle Launch Director Mike Leinbach (left) welcomes Commander Scott Kelly (right). TCDT activities include M-113 armored personnel carrier training, payload familiarization, emergency egress training at the pad and a simulated launch countdown. The STS-118 payload aboard Space Shuttle Endeavour includes the S5 truss, a SPACEHAB module and external stowage platform 3. The mission is the 22nd flight to the International Space Station and is targeted for launch on Aug.7. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- The STS-118 crew strides out of the Operations and Checkout Building eager to get to Launch Pad 39A for launch of Space Shuttle Endeavour at 6:36 p.m. EDT. Seen here are (left to right) Mission Specialists Alvin Drew, teacher-turned-astronaut Barbara R. Morgan, and Dave Williams, who represents the Canadian Space Agency. The STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5, and other payloads such as the SPACEHAB module and the external stowage platform 3. The 11-day mission may be extended to as many as 14 depending on the test of the Station-to-Shuttle Power Transfer System that will allow the docked shuttle to draw electrical power from the station and extend its visits to the orbiting lab. NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In the Operations and Checkout Building during suitup, STS-118 Mission Specialist Barbara R. Morgan, teacher-turned-astronaut, is helped with her helmet for launch aboard Space Shuttle Endeavour. The STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5, and other payloads such as the SPACEHAB module and the external stowage platform 3. The 11-day mission may be extended to as many as 14 depending on the test of the Station-to-Shuttle Power Transfer System that will allow the docked shuttle to draw electrical power from the station and extend its visits to the orbiting lab. NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - The orbiter access arm is positioned against Space Shuttle Endeavour after rollback of the rotating service structure, or RSS, on Launch Pad 39A. At the end of the arm is a clean room from which the astronauts enter the crew compartment of the orbiter for launch. Rollback started at 9 p.m. EDT Aug. 7 and was complete at 10:40 p.m. The RSS provides protected access to the orbiter for changeout and servicing of payloads at the pad. Rollback of the pad's RSS is one of the milestones in preparation for the launch of mission STS-118 at 6:36 p.m. EDT on Aug. 8. Space Shuttle Endeavour's STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5, and other payloads such as the SPACEHAB module and the external stowage platform 3. Photo credit: NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In the Operations and Checkout Building, STS-118 Mission Specialist Dave Williams is donning his launch and entry suit before heading to Launch Pad 39A and launch of Space Shuttle Endeavour at 6:36 p.m. EDT. Williams represents the Canadian Space Agency. Space Shuttle Endeavour's STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5, and other payloads such as the SPACEHAB module and the external stowage platform 3. The 11-day mission may be extended to as many as 14 depending on the test of the Station-to-Shuttle Power Transfer System that will allow the docked shuttle to draw electrical power from the station and extend its visits to the orbiting lab. NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. -- In the Operations and Checkout Building, STS-118 Mission Specialist Rick Mastracchio gets help with his boot after donning his launch and entry suit in preparation for launch aboard Space Shuttle Endeavour. The STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5, and other payloads such as the SPACEHAB module and the external stowage platform 3. The 11-day mission may be extended to as many as 14 depending on the test of the Station-to-Shuttle Power Transfer System that will allow the docked shuttle to draw electrical power from the station and extend its visits to the orbiting lab. NASA/Kim Shiflett

KENNEDY SPACE CENTER, FLA. - The orbiter access arm is positioned against Space Shuttle Endeavour after rollback of the rotating service structure, or RSS, on Launch Pad 39A. At the end of the arm is a clean room from which the astronauts enter the crew compartment of the orbiter for launch. Rollback started at 9 p.m. EDT Aug. 7 and was complete at 10:40 p.m. The RSS provides protected access to the orbiter for changeout and servicing of payloads at the pad. Rollback of the pad's RSS is one of the milestones in preparation for the launch of mission STS-118 at 6:36 p.m. EDT on Aug. 8. Space Shuttle Endeavour's STS-118 mission is the 22nd shuttle flight to the International Space Station. It will continue space station construction by delivering a third starboard truss segment, S5, and other payloads such as the SPACEHAB module and the external stowage platform 3. Photo credit: NASA/Kim Shiflett

S118-E-09190 (18 Aug. 2007) --- The STS-118 and Expedition 15 crews gather for a farewell ceremony in the Zvezda Service Module of the International Space Station. Pictured are astronauts Tracy Caldwell (left), STS-118 mission specialist; Charlie Hobaugh (foreground), STS-118 pilot; Canadian Space Agency's Dave Williams (right), STS-118 mission specialist; cosmonaut Oleg V. Kotov, Expedition 15 flight engineer representing Russia's Federal Space Agency; astronaut Barbara R. Morgan, STS-118 mission specialist; and astronaut Scott Kelly (background), STS-118 commander. Hatches were closed between the station and Space Shuttle Endeavour at 4:10 p.m. on Aug. 18.

KENNEDY SPACE CENTER, FLA. -- The orbiter Endeavour is lifted into the upper levels of the Vehicle Assembly Building. It will be moved laterally over a crossbeam and lowered into high bay 1 for stacking with the external tank and solid rocket boosters on the mobile launcher platform. Endeavour will be launched on mission STS-118, its first flight in more than four years. The shuttle has undergone extensive modifications, including the addition of safety upgrades already added to shuttles Discovery and Atlantis. Endeavour also features new hardware, such as the Station-to-Shuttle Power Transfer System that will allow the docked shuttle to draw electrical power from the station and extend its visits to the orbiting lab. Endeavour is targeted for launch on Aug. 7. Photo credit: NASA/Troy Cryder

As the construction continued on the International Space Station (ISS), STS-118 astronaut and mission specialist, Dave Williams, representing the Canadian Space Agency, was anchored on the foot restraint of the Canadarm2 as he participated in the second session of Extra Vehicular Activity (EVA) for the mission. Assisting Williams was Rick Mastracchio (out of frame). During the 6 hour, 28 minute space walk, the two removed a faulty control moment gyroscope (CMG-3) and installed a new CMG into the Z1 truss. The failed CMG will remain in its temporary stowage location on the exterior of the station until it is returned to Earth on a later Shuttle mission. The new gyroscope is one of four CMGs that are used to control the orbital attitude of the station.

KENNEDY SPACE CENTER, FLA. -- In the Orbiter Processing Facility bay 2, Endeavour's payload bay doors are being closed. The payload will be installed on the launch pad after rollout. The orbiter is designated for mission STS-118, targeted for launch on Aug. 9. The mission will continue space station construction by delivering a third starboard truss segment, S5, as well as carrying the External Stowage Platform 3. The crew comprises seven astronauts: Commander Scott Kelly, Pilot Charles Hobaugh and Mission Specialists Dr. Dafydd (Dave) Williams, Barbara Morgan, Richard Mastracchio, Tracy Caldwell and Benjamin Drew. Williams represents the Canadian Space Agency. Photo credit: NASA/Cory Huston

As the construction continued on the International Space Station (ISS), STS-118 astronaut and mission specialist Rick Mastracchio was anchored on the foot restraint of the Canadarm2 as he participated in the third session of Extra Vehicular Activity (EVA) for the mission. Assisting Mastracchio was Expedition 15 flight engineer Clay Anderson (out of frame). During the 5 hour, 28 minute space walk, the two relocated the S-band Antenna Sub-Assembly from the Port 6 (P6) truss to the Port 1 (P1) truss, installed a new transponder on P1 and retrieved the P6 transponder.

As the construction continued on the International Space Station (ISS), STS-118 astronaut and mission specialist Rick Mastracchio participated in the second session of Extra Vehicular Activity (EVA) for the mission. Assisting Mastracchio was Canadian Space Agency representative Dave Williams (out of frame). During the 6 hour, 28 minute space walk, the two removed a faulty control moment gyroscope (CMG-3) and installed a new CMG into the Z1 truss. The failed CMG will remain in its temporary stowage location on the exterior of the station until it is returned to Earth on a later Shuttle mission. The new gyroscope is one of four CMGs that are used to control the orbital attitude of the station.

KENNEDY SPACE CENTER, FLA. -- In the Orbiter Processing Facility bay 2, Endeavour's payload bay doors are ready to be closed. The payload will be installed on the launch pad after rollout. The orbiter is designated for mission STS-118, targeted for launch on Aug. 9. The mission will continue space station construction by delivering a third starboard truss segment, S5, as well as carrying the External Stowage Platform 3. The crew comprises seven astronauts: Commander Scott Kelly, Pilot Charles Hobaugh and Mission Specialists Dr. Dafydd (Dave) Williams, Barbara Morgan, Richard Mastracchio, Tracy Caldwell and Benjamin Drew. Williams represents the Canadian Space Agency. Photo credit: NASA/Cory Huston

KENNEDY SPACE CENTER, FLA. -- In the Orbiter Processing Facility bay 2, Endeavour's payload bay doors are closed. The payload will be installed on the launch pad after rollout. The orbiter is designated for mission STS-118, targeted for launch on Aug. 9. The mission will continue space station construction by delivering a third starboard truss segment, S5, as well as carrying the External Stowage Platform 3. The crew comprises seven astronauts: Commander Scott Kelly, Pilot Charles Hobaugh and Mission Specialists Dr. Dafydd (Dave) Williams, Barbara Morgan, Richard Mastracchio, Tracy Caldwell and Benjamin Drew. Williams represents the Canadian Space Agency. Photo credit: NASA/Cory Huston

JSC2007-E-44409 (22 Aug. 2007) --- The STS-118 crewmembers and Johnson Space Center's (JSC) director Michael L. Coats (left) are photographed during the STS-118 crew return ceremony on Wednesday, Aug. 22 at Ellington Field's Hangar 990 near JSC. From second left are astronauts Scott Kelly and Charlie Hobaugh, commander and pilot respectively; Tracy Caldwell, Rick Mastracchio, Canadian Space Agency's Dave Williams, Barbara R. Morgan and Alvin Drew, all mission specialists.

S118-E-09187 (18 Aug. 2007) --- The STS-118 and Expedition 15 crews gather for a farewell ceremony in the Zvezda Service Module of the International Space Station. Pictured are astronauts Barbara R. Morgan (foreground), Tracy Caldwell (left) and Rick Mastracchio, all STS-118 mission specialists; along with Scott Kelly (right), STS-118 commander. Hatches were closed between the station and Space Shuttle Endeavour at 4:10 p.m. on Aug. 18.

STS-118 astronaut and mission specialist Dafydd R. “Dave” Williams, representing the Canadian Space Agency, uses Virtual Reality Hardware in the Space Vehicle Mock Up Facility at the Johnson Space Center to rehearse some of his duties for the upcoming mission. This type of virtual reality training allows the astronauts to wear special gloves and other gear while looking at a computer that displays simulating actual movements around the various locations on the station hardware which with they will be working.

ISS015-E-23031 (17 Aug. 2007) --- The Expedition 15 and STS-118 crewmembers assemble in the Destiny laboratory on the International Space Station to greet and answer questions from news media representatives on the ground. ISS crewmembers on the front row, from the left: astronaut Clayton C. Anderson, flight engineer; along with cosmonauts Fyodor Yurchikhin, commander; and Oleg Kotov, flight engineer, both with Russia's Federal Space Agency. STS-118 crewmembers on the middle row, from the left: astronauts Alvin Drew, Barbara R. Morgan and the Canadian Space Agency's Dave Williams, all mission specialists, along with Scott Kelly, commander. STS-118 crewmembers on the back row, from the left: astronaut Charlie Hobaugh, pilot, along with astronauts Rick Mastracchio and Tracy Caldwell, both mission specialists.

STS118-S-002 (May 2007) --- These seven astronauts take a break from training to pose for the STS-118 crew portrait. Pictured from the left are astronauts Richard A. (Rick) Mastracchio, mission specialist; Barbara R. Morgan, mission specialist; Charles O. Hobaugh, pilot; Scott J. Kelly, commander; Tracy E. Caldwell, Canadian Space Agency's Dafydd R. (Dave) Williams, and Alvin Drew Jr., all mission specialists. The crewmembers are attired in training versions of their shuttle launch and entry suits.

JSC2007-E-40800 (5 Aug. 2007) --- An aerial view of part of the Kennedy Space Center's giant complex featuring the Space Shuttle Endeavour and its support stack of hardware on launch pad 39A, the Vehicle Assembly Building (VAB) and surrounding area. Endeavour's launch is scheduled for Aug. 8, 2007 at 6:36 p.m. (EDT) to begin the STS-118 mission. This image was photographed from a NASA T-38 aircraft.