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/Pierre Du Charme, Pool)
FILE - This 1961 file photo provided by NASA shows the original seven Mercury astronauts in their silver spacesuits. From left, first row are Walter Schirra Jr., Donald Slayton, John Glenn and Scott Carpenter. In the back row are Alan Shepard, Jr., Virgil Grissom and Gordon Cooper. NASA's mighty astronaut corps has become a shadow of what it once was. And it's only going to get smaller. It's down to 60 from an all-time high of 149 just a decade ago, with more departures coming once Atlantis returns this week from the very last space shuttle voyage. (AP Photo/NASA, File)
FILE - In this Feb. 20, 1962 file photo provided by NASA, astronaut John Glenn climbs into his Friendship 7 space capsule atop an Atlas rocket at Cape Canaveral, Fla., ready for the flight which made him the first American to orbit the earth. NASA's mighty astronaut corps has become a shadow of what it once was. And it's only going to get smaller. It's down to 60 from an all-time high of 149 just a decade ago, with more departures coming once Atlantis returns this week from the very last space shuttle voyage. (AP Photo/NASA, File)
FILE - This July 20, 1969 file photo provided by NASA shows Apollo 11 commander Neil A. Armstrong inside the Lunar Module while on the lunar surface. Astronauts Armstrong and Edwin E. Aldrin Jr., lunar module Pilot, had already completed their extravehicular activity when this picture was made. First moonwalker Armstrong, first American in orbit John Glenn, Mission Control founder Chris Kraft, Apollo 13 commander Jim Lovell, first shuttle pilot Robert Crippen and others are pushing for a last minute reprieve for the about-to-be-retired space shuttle fleet. (AP Photo/NASA, file)
Astronaut Edgar Mitchell on the surface of the moon during the 1971 Apollo 14 mission
CAPE CANAVERAL, FL - JULY 08: (L-R) Space shuttle Atlantis STS-135 mission specialist Sandra Magnus, pilot Douglas Hurley, mission specialist Rex Walheim and Commander Christopher Ferguson walk out of the NASA Operations and Checkout building hours before their scheduled launch at Kennedy Space Center July 7, 2011 in Cape Canaveral, Florida. Bad weather conditions threaten Atlantis' launch, which will mark the final liftoff in the 30-year-old space shuttle program. (Photo by Chip Somodevilla/Getty Images
Space shuttle Atlantis lifts off from Pad 39A at the Kennedy Space Center in Cape Canaveral, Fla., Friday, July 8, 2011. The STS135 mission, the final shuttle flight, will bring supplies to the international space station. (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 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 Photo/Chris O'Meara)
Space Shuttle Atlantis STS-135 takes off near the Visitors Center at the Kennedy Space Center in Cape Canaveral, Florida July 8, 2011. REUTERS/Chip Litherland (UNITED STATES - Tags: SCI TECH TRANSPORT)
IN SPACE - JULY 12: In this video screen grab provided by the National Aeronautics and Space Administration (NASA), NASA astronaut Mike Fossum, Expedition 28 flight engineer does repairs on the International Space Station during a planned six-and-a-half-hour spacewalk July 12, 2011 in space. Space shuttle Atlantis has embarked on a 12-day mission to the International Space Station where it will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts. This will be the final launch of the space shuttle program, which began on April 12, 1981 with the launch of Colombia. (Photo by NASA via Getty Images)
The last U.S. space shuttle Atlantis departs the International Space Station in this still image taken from NASA TV on July 19, 2011. The mission is the last of a 12-year program to build and service the orbital outpost, the primary legacy of NASA's shuttle fleet. Atlantis' return to Earth, scheduled for Thursday, will conclude the 30-year-old U.S. space shuttle program, with no replacement U.S. spaceships ready to fly. REUTERS/NASA/Handout (UNITED STATES - Tags: SCI TECH) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS. MANDATORY CREDIT
The International Space Station is seen through the docking port of the U.S. space shuttle Atlantis as it departs
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/John Raoux)
Space shuttle Atlantis is towed to the Orbitor Processing facility for decommissioning 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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The International Space Station is seen through the docking port of the U.S. space shuttle Atlantis as it departs
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/John Raoux)
Space shuttle Atlantis is towed to the Orbitor Processing facility for decommissioning 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)
FILE - In this Friday, June 4, 2010 file picture, the SpaceX Falcon 9 test rocket lifts off from complex 40 at the Cape Canaveral Air Force Station in Cape Canaveral, Fla. carrying a mock-up of the company's Dragon spacecraft. With the space shuttle's retirement Thursday, July 21, 2011, no longer will flying people and cargo up to the International Space Station be a government program where costs balloon. NASA is turning to private industry with fixed prices, contracts and profit margins. The space agency will be the customer, not the boss. (AP Photo/John Raoux)
FILE - In this Monday, April 11, 2011 file picture, Alanna Krolikowski peers inside the SpaceX Dragon space capsule, on display for the 27th National Space Symposium in Colorado Springs, Colo. With the space shuttle's retirement Thursday, July 21, 2011, no longer will flying people and cargo up to the International Space Station be a government program where costs balloon. NASA is turning to private industry with fixed prices, contracts and profit margins. The space agency will be the customer, not the boss. (AP Photo/The Colorado Springs Gazette, Mark Reis)
This undated artist rendering provided by Space Exploration Technologies (SpaceX), shows Space Exploration Technology's new rocket Falcon Heavy. On Tuesday, Elon Musk, CEO and chief rocket designer of (SpaceX) unveiled plans to launch the world's most powerful rocket since man went to the moon.
FILE - This artist's rendering provided by Sierra Nevada Space Systems shows the company's proposed Dream Chaser spacecraft docking with the International Space Station. With the space shuttle's retirement Thursday, July 21, 2011, no longer will flying people and cargo up to the International Space Station be a government program where costs balloon. NASA is turning to private industry with fixed prices, contracts and profit margins. The space agency will be the customer, not the boss. (AP Photo/Sierra Nevada Space Systems)
The Howard family from Huddersfield, England, walk along the Max Brewer Bridge before space shuttle Atlantis lifts off Friday, July 8, 2011, in Titusville, Fla. Four astronauts are taking space shuttle Atlantis for one last ride, the very last one of the 30-year space shuttle era. (AP Photo/David J. Phillip)
MOFFETT FIELD, CA - JULY 08: Five year-old Lux Sparks-Pescovitz (R) and his father David Pescovitz (L) watch a live video feed of the launch of space shuttle Atlantis at the NASA reseach center on July 8, 2011 in Moffett Field, California. Space shuttle Atlantis is the final lift off in the 30-year-old shuttle program. (Photo by Justin Sullivan/Getty Images)
TITUSVILLE, FL - JULY 08: Galvin Reller from Troy, Missouri wears his space suit as he waits to watch Space shuttle Atlantis lift off on the last mission of the space shuttle program on July 8, 2011 in Titusville, Florida. Atlantis blasted off on its way to the space station. (Photo by Joe Raedle/Getty Images)
from news.yahoo.com
Space shuttle Atlantis lifts off from Pad 39A at the Kennedy Space Center in Cape Canaveral, Fla., Friday, July 8, 2011. The STS135 mission, the final shuttle flight, will bring supplies to the international space station. (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 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 Photo/Chris O'Meara)
Space Shuttle Atlantis STS-135 takes off near the Visitors Center at the Kennedy Space Center in Cape Canaveral, Florida July 8, 2011. REUTERS/Chip Litherland (UNITED STATES - Tags: SCI TECH TRANSPORT)
IN SPACE - JULY 12: In this video screen grab provided by the National Aeronautics and Space Administration (NASA), NASA astronaut Mike Fossum, Expedition 28 flight engineer does repairs on the International Space Station during a planned six-and-a-half-hour spacewalk July 12, 2011 in space. Space shuttle Atlantis has embarked on a 12-day mission to the International Space Station where it will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts. This will be the final launch of the space shuttle program, which began on April 12, 1981 with the launch of Colombia. (Photo by NASA via Getty Images)
The last U.S. space shuttle Atlantis departs the International Space Station in this still image taken from NASA TV on July 19, 2011. The mission is the last of a 12-year program to build and service the orbital outpost, the primary legacy of NASA's shuttle fleet. Atlantis' return to Earth, scheduled for Thursday, will conclude the 30-year-old U.S. space shuttle program, with no replacement U.S. spaceships ready to fly. REUTERS/NASA/Handout (UNITED STATES - Tags: SCI TECH) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS. MANDATORY CREDIT
The International Space Station is seen through the docking port of the U.S. space shuttle Atlantis as it departs
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/John Raoux)
Space shuttle Atlantis is towed to the Orbitor Processing facility for decommissioning 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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The International Space Station is seen through the docking port of the U.S. space shuttle Atlantis as it departs
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/John Raoux)
Space shuttle Atlantis is towed to the Orbitor Processing facility for decommissioning 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)
FILE - In this Friday, June 4, 2010 file picture, the SpaceX Falcon 9 test rocket lifts off from complex 40 at the Cape Canaveral Air Force Station in Cape Canaveral, Fla. carrying a mock-up of the company's Dragon spacecraft. With the space shuttle's retirement Thursday, July 21, 2011, no longer will flying people and cargo up to the International Space Station be a government program where costs balloon. NASA is turning to private industry with fixed prices, contracts and profit margins. The space agency will be the customer, not the boss. (AP Photo/John Raoux)
FILE - In this Monday, April 11, 2011 file picture, Alanna Krolikowski peers inside the SpaceX Dragon space capsule, on display for the 27th National Space Symposium in Colorado Springs, Colo. With the space shuttle's retirement Thursday, July 21, 2011, no longer will flying people and cargo up to the International Space Station be a government program where costs balloon. NASA is turning to private industry with fixed prices, contracts and profit margins. The space agency will be the customer, not the boss. (AP Photo/The Colorado Springs Gazette, Mark Reis)
This undated artist rendering provided by Space Exploration Technologies (SpaceX), shows Space Exploration Technology's new rocket Falcon Heavy. On Tuesday, Elon Musk, CEO and chief rocket designer of (SpaceX) unveiled plans to launch the world's most powerful rocket since man went to the moon.
FILE - This artist's rendering provided by Sierra Nevada Space Systems shows the company's proposed Dream Chaser spacecraft docking with the International Space Station. With the space shuttle's retirement Thursday, July 21, 2011, no longer will flying people and cargo up to the International Space Station be a government program where costs balloon. NASA is turning to private industry with fixed prices, contracts and profit margins. The space agency will be the customer, not the boss. (AP Photo/Sierra Nevada Space Systems)
The Howard family from Huddersfield, England, walk along the Max Brewer Bridge before space shuttle Atlantis lifts off Friday, July 8, 2011, in Titusville, Fla. Four astronauts are taking space shuttle Atlantis for one last ride, the very last one of the 30-year space shuttle era. (AP Photo/David J. Phillip)
MOFFETT FIELD, CA - JULY 08: Five year-old Lux Sparks-Pescovitz (R) and his father David Pescovitz (L) watch a live video feed of the launch of space shuttle Atlantis at the NASA reseach center on July 8, 2011 in Moffett Field, California. Space shuttle Atlantis is the final lift off in the 30-year-old shuttle program. (Photo by Justin Sullivan/Getty Images)
TITUSVILLE, FL - JULY 08: Galvin Reller from Troy, Missouri wears his space suit as he waits to watch Space shuttle Atlantis lift off on the last mission of the space shuttle program on July 8, 2011 in Titusville, Florida. Atlantis blasted off on its way to the space station. (Photo by Joe Raedle/Getty Images)
from news.yahoo.com
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 Photo/Chris O'Meara)
Space Shuttle Atlantis STS-135 takes off near the Visitors Center at the Kennedy Space Center in Cape Canaveral, Florida July 8, 2011. REUTERS/Chip Litherland (UNITED STATES - Tags: SCI TECH TRANSPORT)
IN SPACE - JULY 12: In this video screen grab provided by the National Aeronautics and Space Administration (NASA), NASA astronaut Mike Fossum, Expedition 28 flight engineer does repairs on the International Space Station during a planned six-and-a-half-hour spacewalk July 12, 2011 in space. Space shuttle Atlantis has embarked on a 12-day mission to the International Space Station where it will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts. This will be the final launch of the space shuttle program, which began on April 12, 1981 with the launch of Colombia. (Photo by NASA via Getty Images)
The last U.S. space shuttle Atlantis departs the International Space Station in this still image taken from NASA TV on July 19, 2011. The mission is the last of a 12-year program to build and service the orbital outpost, the primary legacy of NASA's shuttle fleet. Atlantis' return to Earth, scheduled for Thursday, will conclude the 30-year-old U.S. space shuttle program, with no replacement U.S. spaceships ready to fly. REUTERS/NASA/Handout (UNITED STATES - Tags: SCI TECH) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS. MANDATORY CREDIT
The International Space Station is seen through the docking port of the U.S. space shuttle Atlantis as it departs
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/John Raoux)
Space shuttle Atlantis is towed to the Orbitor Processing facility for decommissioning 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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The International Space Station is seen through the docking port of the U.S. space shuttle Atlantis as it departs
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/John Raoux)
Space shuttle Atlantis is towed to the Orbitor Processing facility for decommissioning 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)
FILE - In this Friday, June 4, 2010 file picture, the SpaceX Falcon 9 test rocket lifts off from complex 40 at the Cape Canaveral Air Force Station in Cape Canaveral, Fla. carrying a mock-up of the company's Dragon spacecraft. With the space shuttle's retirement Thursday, July 21, 2011, no longer will flying people and cargo up to the International Space Station be a government program where costs balloon. NASA is turning to private industry with fixed prices, contracts and profit margins. The space agency will be the customer, not the boss. (AP Photo/John Raoux)
FILE - In this Monday, April 11, 2011 file picture, Alanna Krolikowski peers inside the SpaceX Dragon space capsule, on display for the 27th National Space Symposium in Colorado Springs, Colo. With the space shuttle's retirement Thursday, July 21, 2011, no longer will flying people and cargo up to the International Space Station be a government program where costs balloon. NASA is turning to private industry with fixed prices, contracts and profit margins. The space agency will be the customer, not the boss. (AP Photo/The Colorado Springs Gazette, Mark Reis)
This undated artist rendering provided by Space Exploration Technologies (SpaceX), shows Space Exploration Technology's new rocket Falcon Heavy. On Tuesday, Elon Musk, CEO and chief rocket designer of (SpaceX) unveiled plans to launch the world's most powerful rocket since man went to the moon.
FILE - This artist's rendering provided by Sierra Nevada Space Systems shows the company's proposed Dream Chaser spacecraft docking with the International Space Station. With the space shuttle's retirement Thursday, July 21, 2011, no longer will flying people and cargo up to the International Space Station be a government program where costs balloon. NASA is turning to private industry with fixed prices, contracts and profit margins. The space agency will be the customer, not the boss. (AP Photo/Sierra Nevada Space Systems)
The Howard family from Huddersfield, England, walk along the Max Brewer Bridge before space shuttle Atlantis lifts off Friday, July 8, 2011, in Titusville, Fla. Four astronauts are taking space shuttle Atlantis for one last ride, the very last one of the 30-year space shuttle era. (AP Photo/David J. Phillip)
MOFFETT FIELD, CA - JULY 08: Five year-old Lux Sparks-Pescovitz (R) and his father David Pescovitz (L) watch a live video feed of the launch of space shuttle Atlantis at the NASA reseach center on July 8, 2011 in Moffett Field, California. Space shuttle Atlantis is the final lift off in the 30-year-old shuttle program. (Photo by Justin Sullivan/Getty Images)
TITUSVILLE, FL - JULY 08: Galvin Reller from Troy, Missouri wears his space suit as he waits to watch Space shuttle Atlantis lift off on the last mission of the space shuttle program on July 8, 2011 in Titusville, Florida. Atlantis blasted off on its way to the space station. (Photo by Joe Raedle/Getty Images)
from news.yahoo.com
Space Shuttle Atlantis STS-135 takes off near the Visitors Center at the Kennedy Space Center in Cape Canaveral, Florida July 8, 2011. REUTERS/Chip Litherland (UNITED STATES - Tags: SCI TECH TRANSPORT)
IN SPACE - JULY 12: In this video screen grab provided by the National Aeronautics and Space Administration (NASA), NASA astronaut Mike Fossum, Expedition 28 flight engineer does repairs on the International Space Station during a planned six-and-a-half-hour spacewalk July 12, 2011 in space. Space shuttle Atlantis has embarked on a 12-day mission to the International Space Station where it will deliver the Raffaello multi-purpose logistics module packed with supplies and spare parts. This will be the final launch of the space shuttle program, which began on April 12, 1981 with the launch of Colombia. (Photo by NASA via Getty Images)
The last U.S. space shuttle Atlantis departs the International Space Station in this still image taken from NASA TV on July 19, 2011. The mission is the last of a 12-year program to build and service the orbital outpost, the primary legacy of NASA's shuttle fleet. Atlantis' return to Earth, scheduled for Thursday, will conclude the 30-year-old U.S. space shuttle program, with no replacement U.S. spaceships ready to fly. REUTERS/NASA/Handout (UNITED STATES - Tags: SCI TECH) FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS IMAGE HAS BEEN SUPPLIED BY A THIRD PARTY. IT IS DISTRIBUTED, EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS. MANDATORY CREDIT
The International Space Station is seen through the docking port of the U.S. space shuttle Atlantis as it departs
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/John Raoux)
Space shuttle Atlantis is towed to the Orbitor Processing facility for decommissioning 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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The International Space Station is seen through the docking port of the U.S. space shuttle Atlantis as it departs
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/John Raoux)
Space shuttle Atlantis is towed to the Orbitor Processing facility for decommissioning 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)
FILE - In this Friday, June 4, 2010 file picture, the SpaceX Falcon 9 test rocket lifts off from complex 40 at the Cape Canaveral Air Force Station in Cape Canaveral, Fla. carrying a mock-up of the company's Dragon spacecraft. With the space shuttle's retirement Thursday, July 21, 2011, no longer will flying people and cargo up to the International Space Station be a government program where costs balloon. NASA is turning to private industry with fixed prices, contracts and profit margins. The space agency will be the customer, not the boss. (AP Photo/John Raoux)
FILE - In this Monday, April 11, 2011 file picture, Alanna Krolikowski peers inside the SpaceX Dragon space capsule, on display for the 27th National Space Symposium in Colorado Springs, Colo. With the space shuttle's retirement Thursday, July 21, 2011, no longer will flying people and cargo up to the International Space Station be a government program where costs balloon. NASA is turning to private industry with fixed prices, contracts and profit margins. The space agency will be the customer, not the boss. (AP Photo/The Colorado Springs Gazette, Mark Reis)
This undated artist rendering provided by Space Exploration Technologies (SpaceX), shows Space Exploration Technology's new rocket Falcon Heavy. On Tuesday, Elon Musk, CEO and chief rocket designer of (SpaceX) unveiled plans to launch the world's most powerful rocket since man went to the moon.
FILE - This artist's rendering provided by Sierra Nevada Space Systems shows the company's proposed Dream Chaser spacecraft docking with the International Space Station. With the space shuttle's retirement Thursday, July 21, 2011, no longer will flying people and cargo up to the International Space Station be a government program where costs balloon. NASA is turning to private industry with fixed prices, contracts and profit margins. The space agency will be the customer, not the boss. (AP Photo/Sierra Nevada Space Systems)
The Howard family from Huddersfield, England, walk along the Max Brewer Bridge before space shuttle Atlantis lifts off Friday, July 8, 2011, in Titusville, Fla. Four astronauts are taking space shuttle Atlantis for one last ride, the very last one of the 30-year space shuttle era. (AP Photo/David J. Phillip)
MOFFETT FIELD, CA - JULY 08: Five year-old Lux Sparks-Pescovitz (R) and his father David Pescovitz (L) watch a live video feed of the launch of space shuttle Atlantis at the NASA reseach center on July 8, 2011 in Moffett Field, California. Space shuttle Atlantis is the final lift off in the 30-year-old shuttle program. (Photo by Justin Sullivan/Getty Images)
TITUSVILLE, FL - JULY 08: Galvin Reller from Troy, Missouri wears his space suit as he waits to watch Space shuttle Atlantis lift off on the last mission of the space shuttle program on July 8, 2011 in Titusville, Florida. Atlantis blasted off on its way to the space station. (Photo by Joe Raedle/Getty Images)
from news.yahoo.com
The International Space Station is seen through the docking port of the U.S. space shuttle Atlantis as it departs
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/John Raoux)
Space shuttle Atlantis is towed to the Orbitor Processing facility for decommissioning 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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The International Space Station is seen through the docking port of the U.S. space shuttle Atlantis as it departs
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/John Raoux)
Space shuttle Atlantis is towed to the Orbitor Processing facility for decommissioning 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)
FILE - In this Friday, June 4, 2010 file picture, the SpaceX Falcon 9 test rocket lifts off from complex 40 at the Cape Canaveral Air Force Station in Cape Canaveral, Fla. carrying a mock-up of the company's Dragon spacecraft. With the space shuttle's retirement Thursday, July 21, 2011, no longer will flying people and cargo up to the International Space Station be a government program where costs balloon. NASA is turning to private industry with fixed prices, contracts and profit margins. The space agency will be the customer, not the boss. (AP Photo/John Raoux)
FILE - In this Monday, April 11, 2011 file picture, Alanna Krolikowski peers inside the SpaceX Dragon space capsule, on display for the 27th National Space Symposium in Colorado Springs, Colo. With the space shuttle's retirement Thursday, July 21, 2011, no longer will flying people and cargo up to the International Space Station be a government program where costs balloon. NASA is turning to private industry with fixed prices, contracts and profit margins. The space agency will be the customer, not the boss. (AP Photo/The Colorado Springs Gazette, Mark Reis)
This undated artist rendering provided by Space Exploration Technologies (SpaceX), shows Space Exploration Technology's new rocket Falcon Heavy. On Tuesday, Elon Musk, CEO and chief rocket designer of (SpaceX) unveiled plans to launch the world's most powerful rocket since man went to the moon.
FILE - This artist's rendering provided by Sierra Nevada Space Systems shows the company's proposed Dream Chaser spacecraft docking with the International Space Station. With the space shuttle's retirement Thursday, July 21, 2011, no longer will flying people and cargo up to the International Space Station be a government program where costs balloon. NASA is turning to private industry with fixed prices, contracts and profit margins. The space agency will be the customer, not the boss. (AP Photo/Sierra Nevada Space Systems)
The Howard family from Huddersfield, England, walk along the Max Brewer Bridge before space shuttle Atlantis lifts off Friday, July 8, 2011, in Titusville, Fla. Four astronauts are taking space shuttle Atlantis for one last ride, the very last one of the 30-year space shuttle era. (AP Photo/David J. Phillip)
MOFFETT FIELD, CA - JULY 08: Five year-old Lux Sparks-Pescovitz (R) and his father David Pescovitz (L) watch a live video feed of the launch of space shuttle Atlantis at the NASA reseach center on July 8, 2011 in Moffett Field, California. Space shuttle Atlantis is the final lift off in the 30-year-old shuttle program. (Photo by Justin Sullivan/Getty Images)
TITUSVILLE, FL - JULY 08: Galvin Reller from Troy, Missouri wears his space suit as he waits to watch Space shuttle Atlantis lift off on the last mission of the space shuttle program on July 8, 2011 in Titusville, Florida. Atlantis blasted off on its way to the space station. (Photo by Joe Raedle/Getty Images)
from news.yahoo.com
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/John Raoux)
Space shuttle Atlantis is towed to the Orbitor Processing facility for decommissioning 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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The International Space Station is seen through the docking port of the U.S. space shuttle Atlantis as it departs
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/John Raoux)
Space shuttle Atlantis is towed to the Orbitor Processing facility for decommissioning 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)
FILE - In this Friday, June 4, 2010 file picture, the SpaceX Falcon 9 test rocket lifts off from complex 40 at the Cape Canaveral Air Force Station in Cape Canaveral, Fla. carrying a mock-up of the company's Dragon spacecraft. With the space shuttle's retirement Thursday, July 21, 2011, no longer will flying people and cargo up to the International Space Station be a government program where costs balloon. NASA is turning to private industry with fixed prices, contracts and profit margins. The space agency will be the customer, not the boss. (AP Photo/John Raoux)
FILE - In this Monday, April 11, 2011 file picture, Alanna Krolikowski peers inside the SpaceX Dragon space capsule, on display for the 27th National Space Symposium in Colorado Springs, Colo. With the space shuttle's retirement Thursday, July 21, 2011, no longer will flying people and cargo up to the International Space Station be a government program where costs balloon. NASA is turning to private industry with fixed prices, contracts and profit margins. The space agency will be the customer, not the boss. (AP Photo/The Colorado Springs Gazette, Mark Reis)
This undated artist rendering provided by Space Exploration Technologies (SpaceX), shows Space Exploration Technology's new rocket Falcon Heavy. On Tuesday, Elon Musk, CEO and chief rocket designer of (SpaceX) unveiled plans to launch the world's most powerful rocket since man went to the moon.
FILE - This artist's rendering provided by Sierra Nevada Space Systems shows the company's proposed Dream Chaser spacecraft docking with the International Space Station. With the space shuttle's retirement Thursday, July 21, 2011, no longer will flying people and cargo up to the International Space Station be a government program where costs balloon. NASA is turning to private industry with fixed prices, contracts and profit margins. The space agency will be the customer, not the boss. (AP Photo/Sierra Nevada Space Systems)
The Howard family from Huddersfield, England, walk along the Max Brewer Bridge before space shuttle Atlantis lifts off Friday, July 8, 2011, in Titusville, Fla. Four astronauts are taking space shuttle Atlantis for one last ride, the very last one of the 30-year space shuttle era. (AP Photo/David J. Phillip)
MOFFETT FIELD, CA - JULY 08: Five year-old Lux Sparks-Pescovitz (R) and his father David Pescovitz (L) watch a live video feed of the launch of space shuttle Atlantis at the NASA reseach center on July 8, 2011 in Moffett Field, California. Space shuttle Atlantis is the final lift off in the 30-year-old shuttle program. (Photo by Justin Sullivan/Getty Images)
TITUSVILLE, FL - JULY 08: Galvin Reller from Troy, Missouri wears his space suit as he waits to watch Space shuttle Atlantis lift off on the last mission of the space shuttle program on July 8, 2011 in Titusville, Florida. Atlantis blasted off on its way to the space station. (Photo by Joe Raedle/Getty Images)
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Space shuttle Atlantis is towed to the Orbitor Processing facility for decommissioning 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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The International Space Station is seen through the docking port of the U.S. space shuttle Atlantis as it departs
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/John Raoux)
Space shuttle Atlantis is towed to the Orbitor Processing facility for decommissioning 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)
FILE - In this Friday, June 4, 2010 file picture, the SpaceX Falcon 9 test rocket lifts off from complex 40 at the Cape Canaveral Air Force Station in Cape Canaveral, Fla. carrying a mock-up of the company's Dragon spacecraft. With the space shuttle's retirement Thursday, July 21, 2011, no longer will flying people and cargo up to the International Space Station be a government program where costs balloon. NASA is turning to private industry with fixed prices, contracts and profit margins. The space agency will be the customer, not the boss. (AP Photo/John Raoux)
FILE - In this Monday, April 11, 2011 file picture, Alanna Krolikowski peers inside the SpaceX Dragon space capsule, on display for the 27th National Space Symposium in Colorado Springs, Colo. With the space shuttle's retirement Thursday, July 21, 2011, no longer will flying people and cargo up to the International Space Station be a government program where costs balloon. NASA is turning to private industry with fixed prices, contracts and profit margins. The space agency will be the customer, not the boss. (AP Photo/The Colorado Springs Gazette, Mark Reis)
This undated artist rendering provided by Space Exploration Technologies (SpaceX), shows Space Exploration Technology's new rocket Falcon Heavy. On Tuesday, Elon Musk, CEO and chief rocket designer of (SpaceX) unveiled plans to launch the world's most powerful rocket since man went to the moon.
FILE - This artist's rendering provided by Sierra Nevada Space Systems shows the company's proposed Dream Chaser spacecraft docking with the International Space Station. With the space shuttle's retirement Thursday, July 21, 2011, no longer will flying people and cargo up to the International Space Station be a government program where costs balloon. NASA is turning to private industry with fixed prices, contracts and profit margins. The space agency will be the customer, not the boss. (AP Photo/Sierra Nevada Space Systems)
The Howard family from Huddersfield, England, walk along the Max Brewer Bridge before space shuttle Atlantis lifts off Friday, July 8, 2011, in Titusville, Fla. Four astronauts are taking space shuttle Atlantis for one last ride, the very last one of the 30-year space shuttle era. (AP Photo/David J. Phillip)
MOFFETT FIELD, CA - JULY 08: Five year-old Lux Sparks-Pescovitz (R) and his father David Pescovitz (L) watch a live video feed of the launch of space shuttle Atlantis at the NASA reseach center on July 8, 2011 in Moffett Field, California. Space shuttle Atlantis is the final lift off in the 30-year-old shuttle program. (Photo by Justin Sullivan/Getty Images)
TITUSVILLE, FL - JULY 08: Galvin Reller from Troy, Missouri wears his space suit as he waits to watch Space shuttle Atlantis lift off on the last mission of the space shuttle program on July 8, 2011 in Titusville, Florida. Atlantis blasted off on its way to the space station. (Photo by Joe Raedle/Getty Images)
from news.yahoo.com
FILE - In this Monday, April 11, 2011 file picture, Alanna Krolikowski peers inside the SpaceX Dragon space capsule, on display for the 27th National Space Symposium in Colorado Springs, Colo. With the space shuttle's retirement Thursday, July 21, 2011, no longer will flying people and cargo up to the International Space Station be a government program where costs balloon. NASA is turning to private industry with fixed prices, contracts and profit margins. The space agency will be the customer, not the boss. (AP Photo/The Colorado Springs Gazette, Mark Reis)
This undated artist rendering provided by Space Exploration Technologies (SpaceX), shows Space Exploration Technology's new rocket Falcon Heavy. On Tuesday, Elon Musk, CEO and chief rocket designer of (SpaceX) unveiled plans to launch the world's most powerful rocket since man went to the moon.
FILE - This artist's rendering provided by Sierra Nevada Space Systems shows the company's proposed Dream Chaser spacecraft docking with the International Space Station. With the space shuttle's retirement Thursday, July 21, 2011, no longer will flying people and cargo up to the International Space Station be a government program where costs balloon. NASA is turning to private industry with fixed prices, contracts and profit margins. The space agency will be the customer, not the boss. (AP Photo/Sierra Nevada Space Systems)
The Howard family from Huddersfield, England, walk along the Max Brewer Bridge before space shuttle Atlantis lifts off Friday, July 8, 2011, in Titusville, Fla. Four astronauts are taking space shuttle Atlantis for one last ride, the very last one of the 30-year space shuttle era. (AP Photo/David J. Phillip)
MOFFETT FIELD, CA - JULY 08: Five year-old Lux Sparks-Pescovitz (R) and his father David Pescovitz (L) watch a live video feed of the launch of space shuttle Atlantis at the NASA reseach center on July 8, 2011 in Moffett Field, California. Space shuttle Atlantis is the final lift off in the 30-year-old shuttle program. (Photo by Justin Sullivan/Getty Images)
TITUSVILLE, FL - JULY 08: Galvin Reller from Troy, Missouri wears his space suit as he waits to watch Space shuttle Atlantis lift off on the last mission of the space shuttle program on July 8, 2011 in Titusville, Florida. Atlantis blasted off on its way to the space station. (Photo by Joe Raedle/Getty Images)
from news.yahoo.com
The Howard family from Huddersfield, England, walk along the Max Brewer Bridge before space shuttle Atlantis lifts off Friday, July 8, 2011, in Titusville, Fla. Four astronauts are taking space shuttle Atlantis for one last ride, the very last one of the 30-year space shuttle era. (AP Photo/David J. Phillip)
MOFFETT FIELD, CA - JULY 08: Five year-old Lux Sparks-Pescovitz (R) and his father David Pescovitz (L) watch a live video feed of the launch of space shuttle Atlantis at the NASA reseach center on July 8, 2011 in Moffett Field, California. Space shuttle Atlantis is the final lift off in the 30-year-old shuttle program. (Photo by Justin Sullivan/Getty Images)
TITUSVILLE, FL - JULY 08: Galvin Reller from Troy, Missouri wears his space suit as he waits to watch Space shuttle Atlantis lift off on the last mission of the space shuttle program on July 8, 2011 in Titusville, Florida. Atlantis blasted off on its way to the space station. (Photo by Joe Raedle/Getty Images)
from news.yahoo.com
MOFFETT FIELD, CA - JULY 08: Five year-old Lux Sparks-Pescovitz (R) and his father David Pescovitz (L) watch a live video feed of the launch of space shuttle Atlantis at the NASA reseach center on July 8, 2011 in Moffett Field, California. Space shuttle Atlantis is the final lift off in the 30-year-old shuttle program. (Photo by Justin Sullivan/Getty Images)
TITUSVILLE, FL - JULY 08: Galvin Reller from Troy, Missouri wears his space suit as he waits to watch Space shuttle Atlantis lift off on the last mission of the space shuttle program on July 8, 2011 in Titusville, Florida. Atlantis blasted off on its way to the space station. (Photo by Joe Raedle/Getty Images)
from news.yahoo.com
TITUSVILLE, FL - JULY 08: Galvin Reller from Troy, Missouri wears his space suit as he waits to watch Space shuttle Atlantis lift off on the last mission of the space shuttle program on July 8, 2011 in Titusville, Florida. Atlantis blasted off on its way to the space station. (Photo by Joe Raedle/Getty Images)
from news.yahoo.com
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