What the he__ are you asking? These same flights occur every day over the same routes with the same type of aircraft. The flight plans are never released to the public per se. A hijacker doesn't have to know where the aircraft is going. All he needs to know is where it is at the time and where he wants it to go. As an aside..as to security..they probably gave him a sterilized knife with his breakfast so that he didn't have to go thru the trouble of lugging one aboard with him. Security?