NASA has nearly completed repairs to the space shuttle Atlantis' tank, which took a battering in a hailstorm earlier this year. Space Program managers are so pleased with the progress that they have decided to roll the shuttle back out in preparation for its eventual launch. All being well, the craft will start its journey at 4am, local time.
More: http://www.theregister.co.uk/2007/05/15/space_shuttle_atlantis_rolls_out/