Space Shuttle Discovery Blasts Off For International Space Station

CAPE CANAVERAL, FL - MARCH 15: Space Shuttle Discovery STS-119 mission specialist Koichi Wakata gives a thumbs up to the media after walking out of the Operations and Checkout Building Kennedy Space Center March 15, 2009 in Cape Canaveral, Florida. After lift-off delays caused by a leak in the shuttle's orange external fuel tank the Discovery astronauts are scheduled to lift off later today on a mission to the International Space Station. (Photo by Joe Raedle/Getty Images)