The space shuttle Discovery blasts off from the Kennedy Space Center in 2006. NASA has given the green light to launch the space shuttle on May 31 for a mission to the International Space Station. (AFP/File/Bob Pearson)
Photographers atop the Vehicle Assembly Building record the launch of the space shuttle Discovery Saturday May 31, 2008 at the Kennedy Space Center in Cape Canaveral, Fla. (AP Photo/Chris O'Meara)
The space shuttle Discovery lifts off from its launch pad at the Kennedy Space Center in Cape Canaveral, Florida May 31, 2008. The U.S. space shuttle Discovery lifted off from its Florida launch pad on Saturday on a mission to deliver a bus-sized Japanese laboratory to the International Space Station. REUTERS/Scott Audette (UNITED STATES)
The space shuttle Discovery lifts off from launch pad 39A at the Kennedy Space Center in Cape Canaveral, Florida May 31, 2008. The crew is beginning Mission STS-124 to the International Space Station. REUTERS/Pierre Ducharme (UNITED STATES)
The space shuttle Discovery lifts off from launch pad 39A at the Kennedy Space Center in Cape Canaveral, Florida May 31, 2008. The crew is beginning Mission STS-124 to the International Space Station. REUTERS/Pierre Ducharme (UNITED STATES)
The space shuttle Discovery lifts off from launch pad 39A at the Kennedy Space Center in Cape Canaveral, Florida May 31, 2008. The crew is beginning Mission STS-124 to the International Space Station. REUTERS/Scott Audette (UNITED STATES)
Beachgoers watch the launch of the Space Shuttle Discovery from Jetty Park in Cape Canaveral, Fla., Saturday, May 31, 2008. Discovery and a crew of seven astronauts lifted off on a 13-day mission to the International Space Station. (AP Photo/Phelan M. Ebenhack)
The space shuttle Discovery lifts off from launch pad 39A at the Kennedy Space Center in Cape Canaveral, Florida May 31, 2008. The crew is beginning Mission STS-124 to the International Space Station. REUTERS/Scott Audette (UNITED STATES)
The space shuttle Discovery lifts off from Pad 39-A at the Kennedy Space Center in Florida. Discovery carrying a Japanese research laboratory raced toward the International Space Station Sunday after a successful launch from Florida. (AFP/Stan Honda)
The space shuttle Discovery lifts off from launch pad 39A at the Kennedy Space Center in Cape Canaveral, Florida May 31, 2008. The crew is beginning Mission STS-124 to the International Space Station. (David Carlson/Reuters)
The space shuttle Discovery lifts off from launch pad 39A at the Kennedy Space Center in Cape Canaveral, Florida May 31, 2008. The U.S. space shuttle Discovery lifted off from its Florida launch pad on Saturday on a mission to deliver a bus-sized Japanese laboratory to the International Space Station. (Scott Audette/Reuters)
The space shuttle Discovery lifts off from launch pad 39A at the Kennedy Space Center in Cape Canaveral, Florida May 31, 2008. The crew is beginning Mission STS-124 to the International Space Station. (Scott Audette/Reuters)
The space shuttle Discovery lifts off from the Kennedy Space Center in Cape Canaveral, Florida with the American flag at the press site in the foreground May 31, 2008. The launch begins Mission STS-124 to the International Space Station. (Joe Skipper/Reuters)
The space shuttle Discovery lifts off from the Kennedy Space Center in Cape Canaveral, Florida. The shuttle is preparing to dock with the International Space Station, bringing on board a bus-sized Japanese laboratory and spare parts for a troublesome toilet. (AFP/Getty Images/File/Eliot J. Schechter)
Space Shuttle Discovery lifts off the launch pad at Kennedy Space Center on May 31, in Florida. Discovery docked with the International Space Station on Monday, delivering a bus-sized Japanese laboratory to expand research and badly-needed parts for a troublesome toilet. (AFP/File/Don Emmert)
The space shuttle Discovery lifts off from launch pad 39A at the Kennedy Space Center in Cape Canaveral, Florida May 31, 2008. (Scott Audette/Reuters)
The space shuttle Discovery blasts off from the Kennedy Space Center in 2006. NASA has given the green light to launch the space shuttle on May 31 for a mission to the International Space Station. (AFP/File/Bob Pearson)
Photographers atop the Vehicle Assembly Building record the launch of the space shuttle Discovery Saturday May 31, 2008 at the Kennedy Space Center in Cape Canaveral, Fla. (AP Photo/Chris O'Meara)
The space shuttle Discovery lifts off from its launch pad at the Kennedy Space Center in Cape Canaveral, Florida May 31, 2008. The U.S. space shuttle Discovery lifted off from its Florida launch pad on Saturday on a mission to deliver a bus-sized Japanese laboratory to the International Space Station. REUTERS/Scott Audette (UNITED STATES)
The space shuttle Discovery lifts off from launch pad 39A at the Kennedy Space Center in Cape Canaveral, Florida May 31, 2008. The crew is beginning Mission STS-124 to the International Space Station. REUTERS/Pierre Ducharme (UNITED STATES)
The space shuttle Discovery lifts off from launch pad 39A at the Kennedy Space Center in Cape Canaveral, Florida May 31, 2008. The crew is beginning Mission STS-124 to the International Space Station. REUTERS/Pierre Ducharme (UNITED STATES)
The space shuttle Discovery lifts off from launch pad 39A at the Kennedy Space Center in Cape Canaveral, Florida May 31, 2008. The crew is beginning Mission STS-124 to the International Space Station. REUTERS/Scott Audette (UNITED STATES)
Beachgoers watch the launch of the Space Shuttle Discovery from Jetty Park in Cape Canaveral, Fla., Saturday, May 31, 2008. Discovery and a crew of seven astronauts lifted off on a 13-day mission to the International Space Station. (AP Photo/Phelan M. Ebenhack)
The space shuttle Discovery lifts off from launch pad 39A at the Kennedy Space Center in Cape Canaveral, Florida May 31, 2008. The crew is beginning Mission STS-124 to the International Space Station. REUTERS/Scott Audette (UNITED STATES)
The space shuttle Discovery lifts off from Pad 39-A at the Kennedy Space Center in Florida. Discovery carrying a Japanese research laboratory raced toward the International Space Station Sunday after a successful launch from Florida. (AFP/Stan Honda)
The space shuttle Discovery lifts off from launch pad 39A at the Kennedy Space Center in Cape Canaveral, Florida May 31, 2008. The crew is beginning Mission STS-124 to the International Space Station. (David Carlson/Reuters)
The space shuttle Discovery lifts off from launch pad 39A at the Kennedy Space Center in Cape Canaveral, Florida May 31, 2008. The U.S. space shuttle Discovery lifted off from its Florida launch pad on Saturday on a mission to deliver a bus-sized Japanese laboratory to the International Space Station. (Scott Audette/Reuters)
The space shuttle Discovery lifts off from launch pad 39A at the Kennedy Space Center in Cape Canaveral, Florida May 31, 2008. The crew is beginning Mission STS-124 to the International Space Station. (Scott Audette/Reuters)
The space shuttle Discovery lifts off from the Kennedy Space Center in Cape Canaveral, Florida with the American flag at the press site in the foreground May 31, 2008. The launch begins Mission STS-124 to the International Space Station. (Joe Skipper/Reuters)
The space shuttle Discovery lifts off from the Kennedy Space Center in Cape Canaveral, Florida. The shuttle is preparing to dock with the International Space Station, bringing on board a bus-sized Japanese laboratory and spare parts for a troublesome toilet. (AFP/Getty Images/File/Eliot J. Schechter)
Space Shuttle Discovery lifts off the launch pad at Kennedy Space Center on May 31, in Florida. Discovery docked with the International Space Station on Monday, delivering a bus-sized Japanese laboratory to expand research and badly-needed parts for a troublesome toilet. (AFP/File/Don Emmert)
The space shuttle Discovery lifts off from launch pad 39A at the Kennedy Space Center in Cape Canaveral, Florida May 31, 2008. (Scott Audette/Reuters)
