NASA scrubbed the launch of the space shuttle Endeavour Monday, the fifth cancellation in a month. Thunderstorms forced the agency to stand down about 10 minutes before the scheduled 6:51 p.m. lift-off. Bad weather also grounded the shuttle Saturday and Sunday. Twice in June, hydrogen fuel leaks postponed the mission. The record for launch delays was in 1995, with eight tries to achieve lift-off. Each delay costs about $1 million for fuel and employee overtime, said NASA spokesman Allard Beutel. The launch has been rescheduled for Wednesday at 6:03 p.m.