NASA on Wednesday is preparing to again attempt to launch the space shuttle Endeavour from the international space station in Florida. The shuttle is finished being fueled ahead of its sixth attempt at launching. The Endeavour is set to take off for the space station Wednesday evening, along with seven astronauts. Forecasters put the odds of good weather at 60 percent. Thunderstorms have delayed the mission three times and hydrogen gas leaks have caused two delays. Endeavour holds the final piece of Japan's space lab, which should have flown last month. NASA could also launch Endeavour on Thursday, if managers agree to shorten the flight. Otherwise, the shuttle will have to step aside for a Russian supply run to the space station. That would move the shuttle launch to July 26.
