Actually, the explosive that the authorities claimed the terrorist insergents brought on the plane in liquid form would have taken more than a day to safely dry out to the point of it becoming a weapon. The explosive in crystaline form is a highly unstable high explosive that's kept in suspension to keep it stable and harmless. There's no way it could have been turned into a weapon during the duration of the flight. Also, and I don't know this as fact, but I read that several of the terrorists that were supposedly on that flight that were thrawted, were never on the flight, never had tickets for the flight, and didn't even own passports. It appears that the entire situation was a made up scare tactic. It's possible that someone got some on a plane, but the plans for it would not have been to blow up the plane.