Space Shuttle Discovery Commander Steve Lindsey is strapped into his seat aboard the orbiter as seen in this still from a NASA TV grab, as NASA prepares to launch the spacecraft on the nation's birthday July 4, 2006. (Xinhua/Reuters Photo)

The space shuttle Discovery lifts off from the launch pad at the Kennedy Space Center in Cape Canaveral, Florida, the United State, July 4, 2006. (Xinhua Photo)