New Horizons mission managers: Chris DeBoy, left, Mark Kochte, Rick Shelton, and Michael Vincent, right, wait for a signal from the spacecraft that it is healthy and collected data during the flyby of Ultima Thule, Tuesday, Jan. 1, 2019 in the Mission Operations Center at Johns Hopkins University Applied Physics Laboratory (APL) in Laurel, Maryland. Photo Credit: (NASA/Bill Ingalls)

KENNEDY SPACE CENTER, FLA. -- Former astronauts take their seats in the newest attraction at Kennedy Space Center's Visitor Complex, the Shuttle Launch Experience. In the front row are (from left) Bob Crippen, John Young, Rick Searfoss, Charles Bolden and Norm Thagard. The attraction includes a simulated launch with the sights, sounds and sensations of launching into space. Find out more about the Visitor Complex and the Shuttle Launch Experience at <b>http://www.kennedyspacecenter.com/visitKSC/attractions/index.asp</b>. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- Former astronauts take their seats in the newest attraction at Kennedy Space Center's Visitor Complex, the Shuttle Launch Experience. In the front row are (left to right) John Young, Rick Searfoss, Charles Bolden and Norm Thagard. The attraction includes a simulated launch with the sights, sounds and sensations of launching into space. Find out more about the Visitor Complex and the Shuttle Launch Experience at <b>http://www.kennedyspacecenter.com/visitKSC/attractions/index.asp</b>. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- STS-118 Mission Specialist Rick Mastracchio adjusts his helmet during suitup before the simulated launch countdown that concludes the terminal countdown demonstration test, or TCDT. The STS-118 crew has been at Kennedy for the TCDT activities that also include M-113 training, payload familiarization and emergency egress training at the pad. The mission is the 22nd flight to the International Space Station and Space Shuttle Endeavour will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- Evelyn Husband-Thompson, widow of shuttle commander Rick Husband on mission STS-107, and her children pause in front of the memorial dedicated to the crew of Columbia who were lost as they returned from the mission. Husband-Thompson participated in the special event held to honor NASA's fallen heroes in front of the Space Mirror Memorial at NASA's Kennedy Space Center Visitor Complex. Kennedy marked the NASA Day of Remembrance with special ceremonies. This year the crew of Columbia was remembered in a special way on the day that marked the fifth anniversary of the Columbia accident. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- STS-118 Mission Specialist Rick Mastracchio gets help suiting up before the simulated launch countdown that concludes the terminal countdown demonstration test, or TCDT. The STS-118 crew has been at Kennedy for the TCDT activities that also include M-113 training, payload familiarization and emergency egress training at the pad. The mission is the 22nd flight to the International Space Station and Space Shuttle Endeavour will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- STS-118 Mission Specialist Rick Mastracchio gets help with the fit of his launch and entry suit during Terminal Countdown Demonstration Test (TCDT) activities, 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 tests the fit of his helmet as well as the launch and entry suit. He and other crew members are at Kennedy for the Terminal Countdown Demonstration Test (TCDT) activities, 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. -- At the NASA television studio, the STS-118 crew members participate in a news conference. Seated from left are Commander Scott Kelly, Pilot Charlie Hobaugh and Mission Specialists Tracy Caldwell, Rick Mastracchio, Dave Williams, Barbara R. Morgan and Alvin Drew. The crew has just returned from a 13-day mission to the International Space Station. On the mission, the crew installed a new gyroscope, an external spare parts platform and another truss segment to the expanding station. STS-118 was the 119th space shuttle flight, the 22nd flight to the station, the 20th flight for Endeavour and the second of four missions planned for 2007. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- 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. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- At the NASA television studio, photographers focus on STS-118 Mission Specialist Barbara R. Morgan (second from right) as she answers a question about her experiences during the mission. Others seated at the dais (from left) are NASA Public Information Officer George Diller, Commander Scott Kelly, Pilot Charlie Hobaugh and Mission Specialists Tracy Caldwell, Rick Mastracchio, Dave Williams and Alvin Drew. The crew has just returned from a 13-day mission to the International Space Station. On the mission, the crew installed a new gyroscope, an external spare parts platform and another truss segment to the expanding station. STS-118 was the 119th space shuttle flight, the 22nd flight to the station, the 20th flight for Endeavour and the second of four missions planned for 2007. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- Practicing emergency egress from Launch Pad 39A, STS-118 crew members head for the slidewire basket area. They are taking part in terminal countdown demonstration test activities that included a simulated launch countdown. The crew comprises Commander Scott Kelly, Pilot Charlie Hobaugh and Mission Specialists Dave Williams, Barbara R. Morgan, Rick Mastracchio, Tracy Caldwell and Alvin Drew. 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 STS-118 mission on Space Shuttle Endeavour is the 22nd flight to the International Space Station and will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. Photo credit: 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. -- Practicing emergency egress from Launch Pad 39A, STS-118 crew members head for the slidewire basket area. They are taking part in terminal countdown demonstration test activities that included a simulated launch countdown. The crew comprises Commander Scott Kelly, Pilot Charlie Hobaugh and Mission Specialists Dave Williams, Barbara R. Morgan, Rick Mastracchio, Tracy Caldwell and Alvin Drew. 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 STS-118 mission on Space Shuttle Endeavour is the 22nd flight to the International Space Station and will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- On top of the fixed service structure of Launch Pad 39A, The STS-118 crew poses for a photo after conclusion of the terminal countdown demonstration test. From left are Pilot Charlie Hobaugh, Mission Specialist Rick Mastracchio, Commander Scott Kelly, and Mission Specialists Tracy Caldwell, Barbara R. Morgan, Alvin Drew and Dave Williams. Morgan, who is making her first space flight, joined NASA's Teacher in Space program in 1985 and was selected as an astronaut in 1998. Williams represents the Canadian Space Agency. The STS-118 mission on Space Shuttle Endeavour is the 22nd flight to the International Space Station and will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- STS-118 crew members get a close look at the payloads installed in Space Shuttle Endeavour. Seen in the foreground are Mission Specialists Dave Williams (center), who represents the Canadian Space Agency, and Tracy Caldwell (right). In the background is Mission Specialist Rick Mastracchio. The STS-118 crew has been at Kennedy for terminal countdown demonstration test activities that also include M-113 training, emergency egress training at the pad and a simulated launch countdown. The mission is the 22nd flight to the International Space Station and Space Shuttle Endeavour will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- On the slidewire basket bunker area of Launch Pad 39A, the STS-118 crew talks to the media before the crew's morning training activities in the terminal countdown demonstration test, or TCDT. At right, Mission Specialist Tracy Caldwell has the microphone. The others, from left, are Commander Scott Kelly, Pilot Charlie Hobaugh and Mission Specialists Alvin Drew, Rick Mastracchio, Dave Williams and Barbara Morgan. 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 training, payload familiarization, the emergency egress training at the pad and a simulated launch countdown. The mission is the 22nd flight to the International Space Station and Space Shuttle Endeavour will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- The smiling STS-118 crew walks toward the Astrovan that will take them to Launch Pad 39A for a simulated launch countdown. From left are Mission Specialists Barbara R. Morgan and Rick Mastracchio, Pilot Charlie Hobaugh, Mission Specialists Dave Williams and Tracy Caldwell, and Commander Scott Kelly. Morgan joined NASA's Teacher in Space program in 1985 and was selected as an astronaut in 1998. The countdown concludes the terminal countdown demonstration test, or TCDT. The STS-118 crew has been at Kennedy for the TCDT activities that also include M-113 training, payload familiarization and emergency egress training at the pad. The mission is the 22nd flight to the International Space Station and Space Shuttle Endeavour will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- Practicing emergency egress from Launch Pad 39A, STS-118 crew members climb into a slidewire basket. They are taking part in terminal countdown demonstration test activities that included a simulated launch countdown. The crew comprises Commander Scott Kelly, Pilot Charlie Hobaugh and Mission Specialists Dave Williams, Barbara R. Morgan, Rick Mastracchio, Tracy Caldwell and Alvin Drew. 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 STS-118 mission on Space Shuttle Endeavour is the 22nd flight to the International Space Station and will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- Back on the slidewire landing area of Pad 39A, the STS-118 crew learns about landing in the baskets in the event of an emergency. From left are Mission Specialist Rick Mastracchio, Commander Scott Kelly, Mission Specialists Barbara R. Morgan, Alvin Drew, Dave Williams and Tracy Caldwell, and Pilot Charlie Hobaugh. 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 training activities in the terminal countdown demonstration test, or TCDT. TCDTactivities include M-113 training, payload familiarization, the emergency egress training at the pad and a simulated launch countdown. The mission is the 22nd flight to the International Space Station and Space Shuttle Endeavour will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- 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. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- Practicing emergency egress from Launch Pad 39A, STS-118 crew members climb into a slidewire basket. They are taking part in terminal countdown demonstration test activities that included a simulated launch countdown. The crew comprises Commander Scott Kelly, Pilot Charlie Hobaugh and Mission Specialists Dave Williams, Barbara R. Morgan, Rick Mastracchio, Tracy Caldwell and Alvin Drew. 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 STS-118 mission on Space Shuttle Endeavour is the 22nd flight to the International Space Station and will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- On the slidewire basket bunker area of Launch Pad 39A, the STS-118 crew greets the media before the crew's morning training activities in the terminal countdown demonstration test, or TCDT. From left are Commander Scott Kelly, Pilot Charlie Hobaugh and Mission Specialists Alvin Drew, Rick Mastracchio, Dave Williams, Barbara R. Morgan 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. TCDT activities include M-113 training, payload familiarization, the emergency egress training at the pad and a simulated launch countdown. The mission is the 22nd flight to the International Space Station and Space Shuttle Endeavour will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- On the top level of the Pad 39A fixed service structure, the STS-118 crew takes a break from training activities in the terminal countdown demonstration test, or TCDT. From left are Mission Specialists Dave Williams, Tracy Caldwell, Barbara R. Morgan and Alvin Drew, Pilot Charlie Hobaugh, Commander Scott Kelly and Mission Specialist 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. Behind them is the top of the external tank. TCDTactivities include M-113 training, payload familiarization, the emergency egress training at the pad and a simulated launch countdown. The mission is the 22nd flight to the International Space Station and Space Shuttle Endeavour will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- At the NASA television studio, the STS-118 crew members answer questions from the media during a news conference. Seated from left are Commander Scott Kelly, Pilot Charlie Hobaugh and Mission Specialists Tracy Caldwell, Rick Mastracchio, Dave Williams, Barbara R. Morgan and Alvin Drew. The crew has just returned from a 13-day mission to the International Space Station. On the mission, the crew installed a new gyroscope, an external spare parts platform and another truss segment to the expanding station. STS-118 was the 119th space shuttle flight, the 22nd flight to the station, the 20th flight for Endeavour and the second of four missions planned for 2007. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- Practicing emergency egress from Launch Pad 39A, STS-118 Mission Specialists Alvin Drew and Barbara R. Morgan join another crew member in a slidewire basket. Morgan joined NASA's Teacher in Space program in 1985 and was selected as an astronaut in 1998. Other crew members are Commander Scott Kelly, Pilot Charlie Hobaugh and Mission Specialists Dave Williams, Rick Mastracchio and Tracy Caldwell. Williams represents the Canadian Space Agency. The STS-118 mission on Space Shuttle Endeavour is the 22nd flight to the International Space Station and will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- Members of the STS-118 crew enjoy breakfast together before the next event in their Terminal Countdown Demonstration Test (TCDT), a dress rehearsal for launch. Following the meal, the crew will don their flight suits and board Space Shuttle Endeavour for a simulated countdown. From left are Mission Specialists Alvin Drew and the Canadian Space Agency's Dave Williams, Pilot Charlie Hobaugh, Commander Scott Kelly, and Mission Specialists Tracy Caldwell, Rick Mastracchio and teacher-turned-astronaut Barbara R. Morgan. TCDT activities also include M-113 armored personnel carrier training, payload familiarization, and emergency egress training at the pad. The STS-118 payload 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. -- Practicing emergency egress from Launch Pad 39A, STS-118 crew members climb into a slidewire basket. They are taking part in terminal countdown demonstration test activities that included a simulated launch countdown. The crew comprises Commander Scott Kelly, Pilot Charlie Hobaugh and Mission Specialists Dave Williams, Barbara R. Morgan, Rick Mastracchio, Tracy Caldwell and Alvin Drew. 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 STS-118 mission on Space Shuttle Endeavour is the 22nd flight to the International Space Station and will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- The STS-118 crew walks out of the Operations and Checkout Building, heading for Launch Pad 39A and a simulated launch countdown. On the left, Pilot Charlie Hobaugh leads one column, with Mission Specialist Rick Mastracchio behind him. On the right, Commander Scott Kelly leads, with Mission Specialists Tracy Caldwell and Dave Williams behind. Not pictured are Mission Specialists Alvin Drew and teacher-turned-astronaut Barbara R. Morgan. The countdown concludes the terminal countdown demonstration test, or TCDT. The STS-118 crew has been at Kennedy for the TCDT activities that also include M-113 training, payload familiarization and emergency egress training at the pad. The mission is the 22nd flight to the International Space Station and Space Shuttle Endeavour will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- Practicing emergency egress from Launch Pad 39A, STS-118 Commander Scott Kelly (left) reaches for the pull lever of the slidewire basket. Behind him is Pilot Charlie Hobaugh. At upper left in another basket is Mission Specialist Rick Mastracchio. Other crew members are Mission Specialists Dave Williams, Barbara R. Morgan, Tracy Caldwell and Alvin Drew. 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 STS-118 mission on Space Shuttle Endeavour is the 22nd flight to the International Space Station and will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. NASA/George Shelton

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. 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. -- On the slidewire basket bunker area of Launch Pad 39A, the STS-118 crew talks to the media before the crew's morning training activities in the terminal countdown demonstration test, or TCDT. At left is Commander Scott Kelly, with the microphone. The others, from left, are Pilot Charlie Hobaugh and Mission Specialists Alvin Drew, Rick Mastracchio, Dave Williams, Barbara R. Morgan 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. TCDT activities include M-113 training, payload familiarization, the emergency egress training at the pad and a simulated launch countdown. The mission is the 22nd flight to the International Space Station and Space Shuttle Endeavour will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- Practicing emergency egress from Launch Pad 39A, STS-118 Mission Specialists Tracy Caldwell (left) and Rick Mastracchio are seated in a slidewire basket in the foreground. Others in the background include Mission Specialist Barbara R. Morgan (center). Other crew members are Commander Scott Kelly, Pilot Charlie Hobaugh and Mission Specialists Dave Williams and Alvin Drew. 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 STS-118 mission on Space Shuttle Endeavour is the 22nd flight to the International Space Station and will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- The STS-118 crew walks toward the Astrovan that will take them to Launch Pad 39A for a simulated launch countdown. On the left are Pilot Charlie Hobaugh leading the way and Mission Specialist Rick Mastracchio. ON the right, Commander Scott Kelly leads with (front to back) Mission Specialists Tracy Caldwell, Dave Williams and Alvin Drew. Not visible is teacher-turned-astronaut Barbara R. Morgan, also a mission specialist. The countdown concludes the terminal countdown demonstration test, or TCDT. The STS-118 crew has been at Kennedy for the TCDT activities that also include M-113 training, payload familiarization and emergency egress training at the pad. The mission is the 22nd flight to the International Space Station and Space Shuttle Endeavour will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. Photo credit: 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. -- On an upper level of the Pad 39A fixed service structure, the STS-118 crew members look at the slidewire basket that is part of the emergency egress system. On the left are Commander Scott Kelly and Mission Specialists Barbara R. Morgan, Tracy Caldwell, Dave Williams and Alvin Drew. On the right is Mission Specialist Rick Mastracchio. 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 training activities in the terminal countdown demonstration test, or TCDT. TCDT activities include M-113 training, payload familiarization, the emergency egress training at the pad and a simulated launch countdown. The mission is the 22nd flight to the International Space Station and Space Shuttle Endeavour will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- STS-118 crew members get a close look at the payloads installed in Space Shuttle Endeavour. Seen in the foreground are Mission Specialists Dave Williams (center), who represents the Canadian Space Agency, and Tracy Caldwell (right). In the background is Mission Specialist Rick Mastracchio. The STS-118 crew has been at Kennedy for terminal countdown demonstration test activities that also include M-113 training, emergency egress training at the pad and a simulated launch countdown. The mission is the 22nd flight to the International Space Station and Space Shuttle Endeavour will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- The STS-118 crew walks toward the Astrovan that will take them to Launch Pad 39A for a simulated launch countdown. From left are Mission Specialists Barbara R. Morgan and Rick Mastracchio, Pilot Charlie Hobaugh, Mission Specialists Dave Williams and Tracy Caldwell, and Commander Scott Kelly. Morgan joined NASA's Teacher in Space program in 1985 and was selected as an astronaut in 1998. The countdown concludes the terminal countdown demonstration test, or TCDT. The STS-118 crew has been at Kennedy for the TCDT activities that also include M-113 training, payload familiarization and emergency egress training at the pad. The mission is the 22nd flight to the International Space Station and Space Shuttle Endeavour will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- STS-118 crew members confer with a technician about the payloads installed in Space Shuttle Endeavour. Seen here are Mission Specialists Dave Williams (center), who represents the Canadian Space Agency, and Rick Mastracchio (right). The STS-118 crew has been at Kennedy for terminal countdown demonstration test activities that also include M-113 training, emergency egress training at the pad and a simulated launch countdown. The mission is the 22nd flight to the International Space Station and Space Shuttle Endeavour will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- 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. 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. 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 heads into the Astrovan that will take them to Launch Pad 39A for a simulated launch countdown. First in is Commander Scott Kelly. Following, right to left, are Pilot Charlie Hobaugh and Mission Specialists Tracy Caldwell, Dave Williams, Rick Mastracchio, teacher-turned-astronaut Barbara R. Morgan and Alvin Drew. The countdown concludes the terminal countdown demonstration test, or TCDT. The STS-118 crew has been at Kennedy for the TCDT activities that also include M-113 training, payload familiarization and emergency egress training at the pad. The mission is the 22nd flight to the International Space Station and Space Shuttle Endeavour will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- During a special event at Walt Disney World in Orlando honoring the crew of space shuttle mission STS-118, Mission Specialist Barbara R. Morgan (left) helps dedicate a plaque outside the Mission: Space attraction. At right are Vice President of Epcot Jim MacPhee and NASA Assistant Administrator for Education Joyce Winterton. Along with the dedication, the crew met with students and media and paraded 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, Dave Williams 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. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- The STS-118 crew poses in front of the hatch opening on Space Shuttle Endeavour before the crew's morning training activities in the terminal countdown demonstration test, or TCDT. Standing at left is Mission Specialist Dave Williams. Standing in the back are Commander Scott Kelly (left) and Mission Specialist Alvin Drew; seated in the middle are Mission Specialists Tracy Caldwell (left) and Barbara R. Morgan; kneeling in front are Pilot Charlie Hobaugh (left) and Mission Specialist 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 training, payload familiarization, the emergency egress training at the pad and a simulated launch countdown. The mission is the 22nd flight to the International Space Station and Space Shuttle Endeavour will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- On an upper level of the Pad 39A fixed service structure, the STS-118 crew listen to a trainer, at left, about using the emergency egress system. The crew members are, from left, Commander Scott Kelly, Mission Specialists Tracy Caldwell, Barbara R. Morgan, Dave Williams and Alvin Drew, Pilot Charlie Hobaugh and Mission Specialist 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. The crew is at Kennedy for training activities in the terminal countdown demonstration test, or TCDT. TCDT activities include M-113 training, payload familiarization, the emergency egress training at the pad and a simulated launch countdown. The mission is the 22nd flight to the International Space Station and Space Shuttle Endeavour will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. NASA/George Shelton

KENNEDY SPACE CENTER, Fla. -- On an upper level of the Pad 39A fixed service structure, the STS-118 crew members get directions about using the slidewire basket that is part of the emergency egress system. At left is Mission Specialist Rick Mastracchio. At right are (from the left) Commander Scott Kelly, Mission Specialist Barbara R. Morgan, Pilot Charlie Hobaugh and Mission Specialists Dave Williams and Alvin Drew. 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 training activities in the terminal countdown demonstration test, or TCDT. TCDT activities include M-113 training, payload familiarization, the emergency egress training at the pad and a simulated launch countdown. The mission is the 22nd flight to the International Space Station and Space Shuttle Endeavour will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 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. Commander Scott Kelly (at microphone) introduces his crew to media representatives on site to welcome them. From left are Mission Specialists Alvin Drew; Barbara R. Morgan; Dave Williams, representing the Canadian Space Agency; Rick Mastracchio; Tracy Caldwell; and Pilot Charlie Hobaugh. 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 poses for a photo on Launch Pad 39A during training activities in the terminal countdown demonstration test, or TCDT. From left are Mission Specialists Dave Williams and Barbara R. Morgan, Commander Scott Kelly, Mission Specialist Alvin Drew, Pilot Charlie Hobaugh, and Mission Specialists Rick Mastracchio 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. Behind them can be seen the solid rocket boosters and external tank of Space Shuttle Endeavour atop the mobile launcher platform. TCDT activities include M-113 training, payload familiarization, the emergency egress training at the pad and a simulated launch countdown. The mission is the 22nd flight to the International Space Station and Space Shuttle Endeavour will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. Photo credit: NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- The STS-118 crew breaks for a photo with the Endeavour team and key personnel during payload familiarization. Kneeling in front are Eve Stavros, Boeing flow manager for the mission; Dave Brashinger, with NASA; Paul Boehm, EVA trainer; S. Adam Niev, with NASA Electrical; Louise Kleba, with the KSC payload VITT office; Lance Rogers, a NASA summer co-op; and Jackie Kagey, an EVA trainer. Standing in the back, from left, are photographer Cory Huston; Darren Welsh, EVA trainer; Jack Keifenheim, with NASA Engineering; Mission Specialist Barbara R. Morgan, Pilot Charlie Hobaugh, Mission Specialist Alvin Drew, Commander Scott Kelly, and Mission Specialists Dave Williams and Tracy Caldwell, Lisa Alonso, a NASA summer intern; and (far right) Mission Specialist Rick Mastracchio. 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 22nd shuttle flight to the International Space Station, the STS-118 mission 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/George Shelton

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. -- On the top level of the Pad 39A fixed service structure, the STS-118 crew takes a break from training activities in the terminal countdown demonstration test, or TCDT. From left are Mission Specialist Dave Williams, Pilot Charlie Hobaugh, Mission Specialist Alvin Drew, Commander Scott Kelly and Mission Specialists Tracy Caldwell, Barbara R. Morgan 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. Behind them is the top of the external tank and a solid rocket booster. TCDTactivities include M-113 training, payload familiarization, the emergency egress training at the pad and a simulated launch countdown. The mission is the 22nd flight to the International Space Station and Space Shuttle Endeavour will carry a payload including the S5 truss, a SPACEHAB module and external stowage platform 3. STS-118 is targeted for launch on Aug. 7. NASA/George Shelton

KENNEDY SPACE CENTER, FLA. -- 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. Photo credit: NASA/George Shelton