NASA leaders announce the delay of the next scheduled shuttle flight, 2003-02-01 (photo)

NASA Administrator Michael Griffin (L) walks past Associate Administrator of Space Operations William Readdy, after announcing a two-month delay of the first scheduled space shuttle flight since the Columbia disaster, at NASA Headquarters in Washington, April 29, 2005. Griffin explained scientists need more time to ensure that the fuel tank does not shed potentially dangerous pieces of ice at liftoff. The postponement marked a setback in the U.S. space agency's efforts to return the shuttle fleet to flight after grounding it more than two years ago following the Columbia disaster. All seven astronauts on board died when the spacecraft disintegrated over Texas on February 1, 2003. REUTERS/Larry Downing LSD