NASA
The space shuttle Endeavour sat on Launch Pad 39A as a storm passed prior to the rollback of the Rotating Service Structure, Thursday, April 28, 2011, at Kennedy Space Center in Cape Canaveral, Fla.
Getty Images
Lightning strikes the near the space shuttle Endeavour (L) April 28, 2011 at Kennedy Space Center in Florida.
Associated Press
Lightning flashes in the sky above space shuttle Endeavour at the Kennedy Space Center on Cape Canaveral, Fla., Thursday, April 28, 2011.
Associated Press
Lightning bolts streak across the sky over the Kennedy Space Center in Cape Canaveral, Fla., on the eve of the next-to-last space shuttle launch Thursday, April 26, 2011.
Associated Press
Lightning bolts streak across the sky over the Kennedy Space Center in Cape Canaveral, Fla., on the eve of the next-to-last space shuttle launch Thursday, April 26, 2011.
Getty Images
Storm clouds pass over the Vehicle Assembly Building a few miles from where the space shuttle Endeavour sits on the launch pad April 28, 2011 at Kennedy Space Center.