Your browser or your browser's settings are not supported. To get the best experience possible, please download a compatible browser. If you know your browser is up to date, you should check to ensure that javascript is enabled.
› Learn How
In the early morning hours, space shuttle Atlantis rolls out to Launch Pad 39A at NASA's Kennedy Space Center in Florida after leaving the Vehicle Assembly Building. Photo credit: NASA/Jack Pfaller March 31, 2009