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Spectators watch as the space shuttle Atlantis lands at the Kennedy Space Center in Florida, completing STS-135, the final mission of the NASA shuttle program, on Thursday, July 21, 2011. (AP Photo Houston Chronicle, Smiley N. Pool)
Spectators watch as the space shuttle Atlantis lands at the Kennedy Space Center in Florida, completing STS-135, the final mission of the NASA shuttle program, on Thursday, July 21, 2011. (AP Photo/ Houston Chronicle, Smiley N. Pool)
The drag chute is deployed as the space shuttle Atlantis lands at the Kennedy Space Center in Florida, completing STS-135, the final mission of the NASA shuttle program, on Thursday, July 21, 2011. (AP Photo Houston Chronicle, Smiley N. Pool)
The drag chute is deployed as the space shuttle Atlantis lands at the Kennedy Space Center in Florida, completing STS-135, the final mission of the NASA shuttle program, on Thursday, July 21, 2011. (AP Photo/ Houston Chronicle, Smiley N. Pool)
The drag chute is deployed as the space shuttle Atlantis lands at the Kennedy Space Center in Florida, completing STS-135, the final mission of the NASA shuttle program, on Thursday, July 21, 2011. (AP Photo Houston Chronicle, Smiley N. Pool)
The drag chute is deployed as the space shuttle Atlantis lands at the Kennedy Space Center in Florida, completing STS-135, the final mission of the NASA shuttle program, on Thursday, July 21, 2011. (AP Photo/ Houston Chronicle, Smiley N. Pool)
Commander Chris Ferguson, right, shakes hands with pilot Doug Hurley after landing Space Shuttle Atlantis at the Kennedy Space Center at Cape Canaveral, Fla. Thursday, July 21, 2011. The landing of Atlantis marks the end of NASAs 30 year space shuttle program. Third from right is mission specialist Sandra Mangus and Rex Walheim. (AP PhotoScott Audette, Pool)
Commander Chris Ferguson, right, shakes hands with pilot Doug Hurley after landing Space Shuttle Atlantis at the Kennedy Space Center at Cape Canaveral, Fla. Thursday, July 21, 2011. The landing of Atlantis marks the end of NASA's 30 year space shuttle program. Third from right is mission specialist Sandra Mangus and Rex Walheim. (AP Photo/Scott Audette, Pool)
Commander Chris Ferguson walks under space shuttle Atlantis after landing at the Kennedy Space Center at Cape Canaveral, Fla. Thursday, July 21, 2011. The landing of Atlantis marks the end of NASAs 30 year space shuttle program. (AP PhotoScott Audette, Pool)
Commander Chris Ferguson walks under space shuttle Atlantis after landing at the Kennedy Space Center at Cape Canaveral, Fla. Thursday, July 21, 2011. The landing of Atlantis marks the end of NASA's 30 year space shuttle program. (AP Photo/Scott Audette, Pool)
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The STS- 135 crew stand next space shuttle Atlantis shortly after landing at the Kennedy Space Center at Cape Canaveral, Fla. Thursday, July 21, 2011. From right to left commander Chris Ferguson, pilot Doug Hurley, and mission specialists Sandra Mangus and Rex Walheim. The landing of Atlantis marks the end of NASAs 30 year space shuttle program. (AP PhotoScott Audette, Pool)
The STS- 135 crew stand next space shuttle Atlantis shortly after landing at the Kennedy Space Center at Cape Canaveral, Fla. Thursday, July 21, 2011. From right to left: commander Chris Ferguson, pilot Doug Hurley, and mission specialists Sandra Mangus and Rex Walheim. The landing of Atlantis marks the end of NASA's 30 year space shuttle program. (AP Photo/Scott Audette, Pool)
In this image provided by NASA-TV space shuttle Atlantis sits glowing in this infra-red image after coming to a stop on runway 15 at the Kennedy Space Center in Cape Canaveral, Fla., after completing the final space shuttle flight of the thirty-year program Thursday morning July 21, 2011.The next-to-youngest shuttle will remain at Kennedy Space Center and be put on display. (AP PhotoNASA-TV)
In this image provided by NASA-TV space shuttle Atlantis sits glowing in this infra-red image after coming to a stop on runway 15 at the Kennedy Space Center in Cape Canaveral, Fla., after completing the final space shuttle flight of the thirty-year program Thursday morning July 21, 2011.The next-to-youngest shuttle will remain at Kennedy Space Center and be put on display. (AP Photo/NASA-TV)
Space Shuttle Atlantis lands at the Kennedy Space Center at Cape Canaveral, Fla. Thursday, July 21, 2011. The landing of Atlantis marks the end of NASAs 30 year space shuttle program. (AP PhotoTerry Renna)
Space Shuttle Atlantis lands at the Kennedy Space Center at Cape Canaveral, Fla. Thursday, July 21, 2011. The landing of Atlantis marks the end of NASA's 30 year space shuttle program. (AP Photo/Terry Renna)
In this image provided by NASA-TV space shuttle Atlantis sits glowing in this infra-red image after coming to a stop on runway 15 at the Kennedy Space Center in Cape Canaveral, Fla., after completing the final space shuttle flight of the thirty-year program Thursday morning July 21, 2011.The next-to-youngest shuttle will remain at Kennedy Space Center and be put on display. (AP PhotoNASA-TV)
In this image provided by NASA-TV space shuttle Atlantis sits glowing in this infra-red image after coming to a stop on runway 15 at the Kennedy Space Center in Cape Canaveral, Fla., after completing the final space shuttle flight of the thirty-year program Thursday morning July 21, 2011.The next-to-youngest shuttle will remain at Kennedy Space Center and be put on display. (AP Photo/NASA-TV)
Space Shuttle Atlantis lands at the Kennedy Space Center at Cape Canaveral, Fla. Thursday, July 21, 2011. The landing of Atlantis marks the end of NASAs 30 year space shuttle program. (AP PhotoTerry Renna)
Space Shuttle Atlantis lands at the Kennedy Space Center at Cape Canaveral, Fla. Thursday, July 21, 2011. The landing of Atlantis marks the end of NASA's 30 year space shuttle program. (AP Photo/Terry Renna)
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Space Shuttle Atlantis lands at the Kennedy Space Center at Cape Canaveral, Fla. Thursday, July 21, 2011. The landing of Atlantis marks the end of NASAs 30 year space shuttle program. (AP PhotoTerry Renna)
Space Shuttle Atlantis lands at the Kennedy Space Center at Cape Canaveral, Fla. Thursday, July 21, 2011. The landing of Atlantis marks the end of NASA's 30 year space shuttle program. (AP Photo/Terry Renna)
Space Shuttle Atlantis comes to a complete stop at the Kennedy Space Center landing strip at Cape Canaveral, Fla. Thursday, July 21, 2011. The landing of Atlantis marks the end of NASAs 30 year space shuttle program. (AP PhotoTerry Renna)
Space Shuttle Atlantis comes to a complete stop at the Kennedy Space Center landing strip at Cape Canaveral, Fla. Thursday, July 21, 2011. The landing of Atlantis marks the end of NASA's 30 year space shuttle program. (AP Photo/Terry Renna)
Space shuttle Atlantis lands at the Kennedy Space Center in Cape Canaveral, Fla., Thursday, July 21, 2011. The landing of Atlantis brings the space shuttle program to an end. (AP PhotoJ. Pat Carter)
Space shuttle Atlantis lands at the Kennedy Space Center in Cape Canaveral, Fla., Thursday, July 21, 2011. The landing of Atlantis brings the space shuttle program to an end. (AP Photo/J. Pat Carter)
The space shuttle Atlantis lifts off from the Kennedy Space Center Friday, July 8, 2011, in Cape Canaveral, Fla. Atlantis is the 135th and final space shuttle launch for NASA. (AP PhotoChris OMeara)
The space shuttle Atlantis lifts off from the Kennedy Space Center Friday, July 8, 2011, in Cape Canaveral, Fla. Atlantis is the 135th and final space shuttle launch for NASA. (AP Photo/Chris O'Meara)
The space shuttle Atlantis lifts off from the Kennedy Space Center Friday, July 8, 2011, in Cape Canaveral, Fla. Atlantis is the 135th and final space shuttle launch for NASA. (AP PhotoJohn Raoux)
The space shuttle Atlantis lifts off from the Kennedy Space Center Friday, July 8, 2011, in Cape Canaveral, Fla. Atlantis is the 135th and final space shuttle launch for NASA. (AP Photo/John Raoux)
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The space shuttle Atlantis lifts off from the Kennedy Space Center Friday, July 8, 2011, in Cape Canaveral, Fla. Atlantis is the 135th and final space shuttle launch for NASA. (AP PhotoJohn Raoux)
The space shuttle Atlantis lifts off from the Kennedy Space Center Friday, July 8, 2011, in Cape Canaveral, Fla. Atlantis is the 135th and final space shuttle launch for NASA. (AP Photo/John Raoux)
The space shuttle Atlantis lifts off from the Kennedy Space Center Friday, July 8, 2011, in Cape Canaveral, Fla. Atlantis is the 135th and final space shuttle launch for NASA. (AP PhotoJohn Raoux)
The space shuttle Atlantis lifts off from the Kennedy Space Center Friday, July 8, 2011, in Cape Canaveral, Fla. Atlantis is the 135th and final space shuttle launch for NASA. (AP Photo/John Raoux)
The space shuttle Atlantis lifts off from the Kennedy Space Center Friday, July 8, 2011, in Cape Canaveral, Fla. Atlantis is the 135th and final space shuttle launch for NASA. (AP PhotoTim Donnelly)
The space shuttle Atlantis lifts off from the Kennedy Space Center Friday, July 8, 2011, in Cape Canaveral, Fla. Atlantis is the 135th and final space shuttle launch for NASA. (AP Photo/Tim Donnelly)
The space shuttle Atlantis lifts off from the Kennedy Space Center Friday, July 8, 2011, in Cape Canaveral, Fla. Atlantis is the 135th and final space shuttle launch for NASA. (AP PhotoDenis Paquin)
The space shuttle Atlantis lifts off from the Kennedy Space Center Friday, July 8, 2011, in Cape Canaveral, Fla. Atlantis is the 135th and final space shuttle launch for NASA. (AP Photo/Denis Paquin)
The space shuttle Atlantis astronauts left to right, pilot Doug Hurley, mission specialist Sandra Mangus, commander Chris Ferguson and missions specialist Rex Walheim, leave the operations and check out building on their way to the pad at the Kennedy Space Center Friday, July 8, 2011, in Cape Canaveral, Fla. Atlantis is the 135th and final space shuttle launch for NASA. (AP PhotoJohn Raoux)
The space shuttle Atlantis astronauts left to right, pilot Doug Hurley, mission specialist Sandra Mangus, commander Chris Ferguson and missions specialist Rex Walheim, leave the operations and check out building on their way to the pad at the Kennedy Space Center Friday, July 8, 2011, in Cape Canaveral, Fla. Atlantis is the 135th and final space shuttle launch for NASA. (AP Photo/John Raoux)
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Atlantis commander Chris Ferguson, right, applauds with pilot Doug Hurley before leaving the operations and check up building enroute to the pad for at the Kennedy Space Center Friday, July 8, 2011, in Cape Canaveral, Fla. Atlantis is the 135th and final space shuttle launch for NASA.(AP PhotoTerry Renna)
Atlantis commander Chris Ferguson, right, applauds with pilot Doug Hurley before leaving the operations and check up building enroute to the pad for at the Kennedy Space Center Friday, July 8, 2011, in Cape Canaveral, Fla. Atlantis is the 135th and final space shuttle launch for NASA.(AP Photo/Terry Renna)
People sleep on the beach in Cocoa Beach on Friday, July 8, 2011. Thousands headed to the Florida coast Friday morning, anxious for a good spot to view the final launch of space shuttle Atlantis. (AP PhotoDave Martin)
People sleep on the beach in Cocoa Beach on Friday, July 8, 2011. Thousands headed to the Florida coast Friday morning, anxious for a good spot to view the final launch of space shuttle Atlantis. (AP Photo/Dave Martin)
The space shuttle Atlantis astronauts left to right, mission specialists Rex Walheim, Sandy Magnus, pilot Doug Hurley and commander Chris Ferguson, leave the operations and check-out building on the way to the pad at the Kennedy Space Center Friday, July 8, 2011, in Cape Canaveral, Fla. Atlantis is the 135th and final space shuttle launch for NASA. (AP PhotoTerry Renna)
The space shuttle Atlantis astronauts left to right, mission specialists Rex Walheim, Sandy Magnus, pilot Doug Hurley and commander Chris Ferguson, leave the operations and check-out building on the way to the pad at the Kennedy Space Center Friday, July 8, 2011, in Cape Canaveral, Fla. Atlantis is the 135th and final space shuttle launch for NASA. (AP Photo/Terry Renna)
Jeff Eaton of Cocoa Beach, Fla., sells t-shirts along A1A in Cocoa Beach on Friday, July 8, 2011. Thousands headed to the Florida coast Friday morning, anxious for a good spot to view the final launch of space shuttle Atlantis. (AP PhotoDave Martin)
Jeff Eaton of Cocoa Beach, Fla., sells t-shirts along A1A in Cocoa Beach on Friday, July 8, 2011. Thousands headed to the Florida coast Friday morning, anxious for a good spot to view the final launch of space shuttle Atlantis. (AP Photo/Dave Martin)
Jim Block, from Ohio, looks through his camera at space shuttle Atlantis as it sits on the launch pad Friday, July 8, 2011, in Titusville, Fla. Atlantis is scheduled to liftoff Friday on the final space shuttle mission. (AP PhotoDavid J. Phillip)
Jim Block, from Ohio, looks through his camera at space shuttle Atlantis as it sits on the launch pad Friday, July 8, 2011, in Titusville, Fla. Atlantis is scheduled to liftoff Friday on the final space shuttle mission. (AP Photo/David J. Phillip)
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In this image provided by NASA the space shuttle Atlantis is seen shortly after the rotating service structure (RSS) was rolled back at launch pad 39a, Thursday, July 7, 2011 at the NASA Kennedy Space Center in Cape Canaveral, Fla. Atlantis is set to liftoff Friday on the final flight of the shuttle program, STS-135, a 12-day mission to the International Space Station. NASA decided to start the fueling operations early Friday morning. (AP PhotoNASA - Bill Ingalls)
In this image provided by NASA the space shuttle Atlantis is seen shortly after the rotating service structure (RSS) was rolled back at launch pad 39a, Thursday, July 7, 2011 at the NASA Kennedy Space Center in Cape Canaveral, Fla. Atlantis is set to liftoff Friday on the final flight of the shuttle program, STS-135, a 12-day mission to the International Space Station. NASA decided to start the fueling operations early Friday morning. (AP Photo/NASA - Bill Ingalls)
Space shuttle Endeavour is towed to the Orbiter Processing Facility after its final mission, a 16 day mission to the International Space Station, at the Kennedy Space Center in Cape Canaveral, Fla., Wednesday, June 1, 2011.(AP PhotoJohn Raoux)
Space shuttle Endeavour is towed to the Orbiter Processing Facility after its final mission, a 16 day mission to the International Space Station, at the Kennedy Space Center in Cape Canaveral, Fla., Wednesday, June 1, 2011.(AP Photo/John Raoux)
An image made from NASA Television shows the Endeavoour as it does its fly around of the International Space Station Monday May 30, 2011, before returning home on NASAs penultimate shuttle mission. The shuttle is viewed from the Space Station as they pass over Australia. (AP PhotoHASA)
An image made from NASA Television shows the Endeavoour as it does it's fly around of the International Space Station Monday May 30, 2011, before returning home on NASA's penultimate shuttle mission. The shuttle is viewed from the Space Station as they pass over Australia. (AP Photo/HASA)
The space shuttle Endeavour prepares to land after completing her final flight at the Kennedy Space Center in Cape Canaveral, Fla., Wednesday, June 1, 2011. Endeavour , and her crew of six astronauts, wrapped up a 16 day mission to the international space station. (AP PhotoOrlando Sentinel, Pool)
The space shuttle Endeavour prepares to land after completing her final flight at the Kennedy Space Center in Cape Canaveral, Fla., Wednesday, June 1, 2011. Endeavour , and her crew of six astronauts, wrapped up a 16 day mission to the international space station. (AP Photo/Orlando Sentinel, Pool)
Crew members of Space shuttle Endeavour, from left, mission specialists Mike Fincke, Greg Chamitoff and British born U.S. astronaut, pilot Greg Johnson make their way around the orbiter after landing at the Kennedy Space Center in Cape Canaveral, Fla., Wednesday, June 1, 2011. (AP PhotoJohn Raoux, Pool)
Crew members of Space shuttle Endeavour, from left, mission specialists Mike Fincke, Greg Chamitoff and British born U.S. astronaut, pilot Greg Johnson make their way around the orbiter after landing at the Kennedy Space Center in Cape Canaveral, Fla., Wednesday, June 1, 2011. (AP Photo/John Raoux, Pool)
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The crew of space shuttle Endeavour, from left, European Space Agency astronaut Roberto Vittori, of Italy, British born U.S. astronaut, pilot Greg Johnson, commander Mark Kelly, mission specialist Mike Fincke, Canadian born U.S. astronaut Greg Chamitoff and mission specialist Drew Feustel wave to space workers and media memebers after landing at the Kennedy Space Center in Cape Canaveral, Fla., Wednesday, June 1, 2011.(AP PhotoJohn Raoux, Pool)
The crew of space shuttle Endeavour, from left, European Space Agency astronaut Roberto Vittori, of Italy, British born U.S. astronaut, pilot Greg Johnson, commander Mark Kelly, mission specialist Mike Fincke, Canadian born U.S. astronaut Greg Chamitoff and mission specialist Drew Feustel wave to space workers and media memebers after landing at the Kennedy Space Center in Cape Canaveral, Fla., Wednesday, June 1, 2011.(AP Photo/John Raoux, Pool)
Space shuttle Endeavour British born U.S. astronaut, pilot Greg Johnson, left, NASA Administrator Charlie Bolden, center, and mission specialist Drew Feustel, check out the underside of the orbiter after landing at the Kennedy Space Center in Cape Canaveral, Fla., Wednesday, June 1, 2011.(AP PhotoJohn Raoux, Pool)
Space shuttle Endeavour British born U.S. astronaut, pilot Greg Johnson, left, NASA Administrator Charlie Bolden, center, and mission specialist Drew Feustel, check out the underside of the orbiter after landing at the Kennedy Space Center in Cape Canaveral, Fla., Wednesday, June 1, 2011.(AP Photo/John Raoux, Pool)
Space shuttle Endeavour mission specialist European Space Agency astronaut Roberto Vittori, of Italy, checks out the orbiter following a 16 day mission to the International Space Station, after landing at the Kennedy Space Center in Cape Canaveral, Fla., Wednesday, June 1, 2011.(AP PhotoJohn Raoux, Pool)
Space shuttle Endeavour mission specialist European Space Agency astronaut Roberto Vittori, of Italy, checks out the orbiter following a 16 day mission to the International Space Station, after landing at the Kennedy Space Center in Cape Canaveral, Fla., Wednesday, June 1, 2011.(AP Photo/John Raoux, Pool)
NASA Air Traffic Controller Larry Parker monitors air traffic from the control tower moments before the Space Shuttle Endeavour (STS-134) maKes its final landing at the Shuttle Landing Facility (SLF) at Kennedy Space Center, Wednesday, June 1, 2011, in Cape Canaveral, Fla. Endeavour, completd a 16-day final mission to outfit the International Space Station. Endeavour spent 299 days in space and traveled more than 122.8 million miles during its 25 flights. It launched on its first mission on May 7, 1992. (AP PhotoNASA, Bill Ingalls) MANDATORY CREDIT
NASA Air Traffic Controller Larry Parker monitors air traffic from the control tower moments before the Space Shuttle Endeavour (STS-134) maKes its final landing at the Shuttle Landing Facility (SLF) at Kennedy Space Center, Wednesday, June 1, 2011, in Cape Canaveral, Fla. Endeavour, completd a 16-day final mission to outfit the International Space Station. Endeavour spent 299 days in space and traveled more than 122.8 million miles during its 25 flights. It launched on its first mission on May 7, 1992. (AP Photo/NASA, Bill Ingalls) MANDATORY CREDIT
The STS-134 astronauts from left, European Space Agencys Roberto Vittori, Gregory H. Johnson, pilot Mark Kelly, commander and Michael Fincke, Greg Chamitoff, and Andrew Feustel, all mission specialists, pose for a group photograph shortly after landing onboard the space shuttle Endeavour at the Shuttle Landing Facility (SLF) at Kennedy Space Center, Wednesday, June 1, 2011, in Cape Canaveral, Fla. Endeavour, completed a 16-day final mission to outfit the International Space Station. Endeavour spent 299 days in space and traveled more than 122.8 million miles during its 25 flights. It launched on its first mission on May 7, 1992. (AP PhotoNASA, Bill Ingalls) MANDATORY CREDIT
The STS-134 astronauts from left, European Space Agency's Roberto Vittori, Gregory H. Johnson, pilot; Mark Kelly, commander; and Michael Fincke, Greg Chamitoff, and Andrew Feustel, all mission specialists, pose for a group photograph shortly after landing onboard the space shuttle Endeavour at the Shuttle Landing Facility (SLF) at Kennedy Space Center, Wednesday, June 1, 2011, in Cape Canaveral, Fla. Endeavour, completed a 16-day final mission to outfit the International Space Station. Endeavour spent 299 days in space and traveled more than 122.8 million miles during its 25 flights. It launched on its first mission on May 7, 1992. (AP Photo/NASA, Bill Ingalls) MANDATORY CREDIT
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A photo made from NASA video shows Endeavour over the western Pacific as it approaches the International Space Station Wednesday May 18, 2011 on the penultimate voyage of the space shuttle program. It is carrying a particle physics detector for the station. (AP PhotoNASA)
A photo made from NASA video shows Endeavour over the western Pacific as it approaches the International Space Station Wednesday May 18, 2011 on the penultimate voyage of the space shuttle program. It is carrying a particle physics detector for the station. (AP Photo/NASA)
A photo made from NASA video shows the Endeavour docking probe, bottom as it approaches the docking module on the Harmony node of the International Space Station, top, just prior to docking Wednesday May 18, 2011 as the pair approach the coast of Chile over the Pacific on the penultimate voyage of the space shuttle program. It is carrying a particle physics detector for the station. (AP PhotoNASA)
A photo made from NASA video shows the Endeavour docking probe, bottom as it approaches the docking module on the Harmony node of the International Space Station, top, just prior to docking Wednesday May 18, 2011 as the pair approach the coast of Chile over the Pacific on the penultimate voyage of the space shuttle program. It is carrying a particle physics detector for the station. (AP Photo/NASA)
A photo made from NASA video shows the Endeavour docked on the Harmony node of the International Space Station, Wednesday May 18, 2011 on the penultimate voyage of the space shuttle program. It is carrying a particle physics detector for the station. (AP PhotoNASA)
A photo made from NASA video shows the Endeavour docked on the Harmony node of the International Space Station, Wednesday May 18, 2011 on the penultimate voyage of the space shuttle program. It is carrying a particle physics detector for the station. (AP Photo/NASA)
The space shuttle Endeavour lifts off from Kennedy Space Center in Cape Canaveral, Fla., Monday, May 16, 2011. The space shuttle Endeavour began a 14-day mission to the international space station. (AP PhotoJohn Raoux)
The space shuttle Endeavour lifts off from Kennedy Space Center in Cape Canaveral, Fla., Monday, May 16, 2011. The space shuttle Endeavour began a 14-day mission to the international space station. (AP Photo/John Raoux)
Space shuttle Endeavour leaves a smoke trail as it soars toward the sky after launch at Cape Canaveral, Fla., on Monday, May 16, 2011. (AP PhotoChris OMeara)
Space shuttle Endeavour leaves a smoke trail as it soars toward the sky after launch at Cape Canaveral, Fla., on Monday, May 16, 2011. (AP Photo/Chris O'Meara)
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The space shuttle Endeavour lifts off from Kennedy Space Center in Cape Canaveral, Fla., Monday, May 16, 2011. The space shuttle Endeavour began a 14-day mission to the international space station. (AP PhotoJohn Raoux)
The space shuttle Endeavour lifts off from Kennedy Space Center in Cape Canaveral, Fla., Monday, May 16, 2011. The space shuttle Endeavour began a 14-day mission to the international space station. (AP Photo/John Raoux)
The space shuttle Endeavour lifts off from Kennedy Space Center in Cape Canaveral, Fla., Monday, May 16, 2011. The space shuttle Endeavour began a 14-day mission to the international space station. (AP PhotoChris OMeara)
The space shuttle Endeavour lifts off from Kennedy Space Center in Cape Canaveral, Fla., Monday, May 16, 2011. The space shuttle Endeavour began a 14-day mission to the international space station. (AP Photo/Chris O'Meara)
The space shuttle Endeavour lifts off from Kennedy Space Center in Cape Canaveral, Fla., Monday, May 16, 2011. The space shuttle Endeavour began a 14-day mission to the international space station. (AP PhotoChris OMeara)
The space shuttle Endeavour lifts off from Kennedy Space Center in Cape Canaveral, Fla., Monday, May 16, 2011. The space shuttle Endeavour began a 14-day mission to the international space station. (AP Photo/Chris O'Meara)
The space shuttle Endeavour lifts off from Kennedy Space Center in Cape Canaveral, Fla., Monday, May 16, 2011. The space shuttle Endeavour began a 14-day mission to the international space station. (AP PhotoMarta Lavandier)
The space shuttle Endeavour lifts off from Kennedy Space Center in Cape Canaveral, Fla., Monday, May 16, 2011. The space shuttle Endeavour began a 14-day mission to the international space station. (AP Photo/Marta Lavandier)
The space shuttle Endeavour lifts off from Kennedy Space Center in Cape Canaveral, Fla., Monday, May 16, 2011. The space shuttle Endeavour began a 14-day mission to the international space station. (AP PhotoMarta Lavandier)
The space shuttle Endeavour lifts off from Kennedy Space Center in Cape Canaveral, Fla., Monday, May 16, 2011. The space shuttle Endeavour began a 14-day mission to the international space station. (AP Photo/Marta Lavandier)
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The space shuttle Endeavour lifts off from Kennedy Space Center in Cape Canaveral, Fla., Monday, May 16, 2011. The space shuttle Endeavour began a 14-day mission to the international space station. (AP PhotoJohn Raoux)
The space shuttle Endeavour lifts off from Kennedy Space Center in Cape Canaveral, Fla., Monday, May 16, 2011. The space shuttle Endeavour began a 14-day mission to the international space station. (AP Photo/John Raoux)
Space shuttle Endeavour leaves a smoke trail as it soars toward the sky after launch at Cape Canaveral, Fla., on Monday, May 16, 2011. (AP PhotoChris OMeara)
Space shuttle Endeavour leaves a smoke trail as it soars toward the sky after launch at Cape Canaveral, Fla., on Monday, May 16, 2011. (AP Photo/Chris O'Meara)
Space shuttle Endeavour clears the launch pad at Cape Canaveral, Fla., on Monday, May 16, 2011. (AP PhotoChris OMeara)
Space shuttle Endeavour clears the launch pad at Cape Canaveral, Fla., on Monday, May 16, 2011. (AP Photo/Chris O'Meara)
Spectators watch the space shuttle Endeavour lifts off from Kennedy Space Center in Cape Canaveral, Fla., Monday, May 16, 2011. The space shuttle Endeavour began a 14-day mission to the international space station. (AP PhotoTerry Renna)
Spectators watch the space shuttle Endeavour lifts off from Kennedy Space Center in Cape Canaveral, Fla., Monday, May 16, 2011. The space shuttle Endeavour began a 14-day mission to the international space station. (AP Photo/Terry Renna)
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The space shuttle Endeavour lifts off from Kennedy Space Center in Cape Canaveral, Fla., Monday, May 16, 2011. The space shuttle Endeavour began a 14-day mission to the international space station. (AP PhotoTerry Renna)
The space shuttle Endeavour lifts off from Kennedy Space Center in Cape Canaveral, Fla., Monday, May 16, 2011. The space shuttle Endeavour began a 14-day mission to the international space station. (AP Photo/Terry Renna)
Space shuttle Endeavour flies past the US Flag after launch at Cape Canaveral, Fla., on Monday, May 16, 2011. (AP PhotoJohn Raoux)
Space shuttle Endeavour flies past the US Flag after launch at Cape Canaveral, Fla., on Monday, May 16, 2011. (AP Photo/John Raoux)
The space shuttle Endeavour lifts off from Kennedy Space Center in Cape Canaveral, Fla., Monday, May 16, 2011. The space shuttle Endeavour began a 14-day mission to the international space station. (AP PhotoJohn Raoux)
The space shuttle Endeavour lifts off from Kennedy Space Center in Cape Canaveral, Fla., Monday, May 16, 2011. The space shuttle Endeavour began a 14-day mission to the international space station. (AP Photo/John Raoux)
Photographers capture the launch of space shuttle Endeavour at Cape Canaveral, Fla., on Monday, May 16, 2011. (AP PhotoJ. David Ake)
Photographers capture the launch of space shuttle Endeavour at Cape Canaveral, Fla., on Monday, May 16, 2011. (AP Photo/J. David Ake)
Photographers capture sunrise behind space shuttle Endeavour a couple of hours before the scheduled launch at Cape Canaveral, Fla., on Monday, May 16, 2011. (AP PhotoJ. David Ake)
Photographers capture sunrise behind space shuttle Endeavour a couple of hours before the scheduled launch at Cape Canaveral, Fla., on Monday, May 16, 2011. (AP Photo/J. David Ake)
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The crew of space shuttle Endeavour, from left, Canadian born U.S. astronaut Greg Chamitoff, mission specialist Drew Feustel, European Space Agency astronaut Roberto Vittori, of Italy, mission specialist Mike Fincke, British born U.S. astronaut, pilot Greg Johnson and commander Mark Kelly, leave the Operations and Checkout building on their way to Pad 39A to board the shuttle at the Kennedy Space Center in Cape Canaveral, Fla., Monday, May 16, 2011.(AP PhotoJohn Raoux)
The crew of space shuttle Endeavour, from left, Canadian born U.S. astronaut Greg Chamitoff, mission specialist Drew Feustel, European Space Agency astronaut Roberto Vittori, of Italy, mission specialist Mike Fincke, British born U.S. astronaut, pilot Greg Johnson and commander Mark Kelly, leave the Operations and Checkout building on their way to Pad 39A to board the shuttle at the Kennedy Space Center in Cape Canaveral, Fla., Monday, May 16, 2011.(AP Photo/John Raoux)
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