NASA gave the green light for a launch attempt Tuesday for Space Shuttle Discovery on its Return to Flight mission (STS-114). Launch is scheduled for 10:39 a.m. EDT, and it will be carried live on NASA TV.

Senior NASA managers met Sunday at Kennedy Space Center for a launch readiness meeting. Discussions focused on recent problems related to a liquid hydrogen low-level fuel sensor inside the external fuel tank, which prompted postponement of the Shuttle's launch on July 13. Since then, engineers have been working around the clock on troubleshooting the sensor system issue.

Watch the Launch of Discovery on Your Computer with NASA TV (NTV). NASA TV is a resource designed to provide real-time coverage of Agency activities and missions as well as providing resource video to the news media, and educational programming to teachers, students and the general public.