NASA targeting late Friday for shuttle launch try

NASA will try to launch space shuttle Discovery to the international space station late Friday night, after back-to-back delays caused by bad weather and fuel valve trouble. It will be the third try for NASA, which is still struggling to understand why a critical shuttle fuel valve appeared to malfunction Tuesday midway through the fueling process. The valve was tested Wednesday night, and all indications were that it was a problem with a sensor rather than the valve itself. The hydrogen fuel valve, a big 8-inch device, is located in Discovery's engine compartment. More

(Source: The Associated Press - Aug 28)