MILES O'BRIEN, CNN SPACE CORRESPONDENT: Hello, I'm Miles O'Brien, reporting live from the Kennedy Space Center, where NASA is not having a very good day. First, the weather. It has been getting progressively worse all day, low clouds, thick clouds, and a rain which is getting heavier by the moment. The space shuttle Endeavour, about three miles off my shoulder, is fueled up with 500,000 gallons of liquid hydrogen and oxygen, six crew members strapped aboard. They have about a two-hour launch window which opens up right about now and closes at about 2:49 p.m. Eastern Time. In addition to that, in a building that's off to my right shoulder, the launch control center, engineers are frantically trying to figure out what is wrong with one of the computer systems on board the space shuttle Endeavour. It's a so-called master event controller which interfaces with the on board computers and is very critical to the flight, because it controls the jettisoning of the solid rocket boosters, the external fuel tank and other critical functions of the space shuttle Endeavour. Until that particular computer problem can be straightened out, there will be no launch here today, and certainly there will no launch until the weather clears. So, we will stay with it and, of course, if a launch should happen we will bring it to you live right here on CNN. This is Miles O'Brien, reporting live from the Kennedy Space Center.
Weather, Computer Problem Halts Shuttle Endeavour Launch Countdown