Everything looking up for Saturday space launch

NASA zipped through the final hours of its countdown for space shuttle Endeavour, on track for a Saturday morning launch to the international space station.Forecasters were sticking with their 90 percent "go" weather forecast.NASA began fueling the spaceship late Friday night, and the seven astronauts were set to climb aboard in the wee hours of Saturday. Launch time is 7:17 a.m., less than an