Airport video shows hijackers being searched before boarding plane.   While I have always disbelieved the story that the Sep. 11 hijackers were able to take control of the plane and subdue the passengers with the mere use of box cutters, this video now casts more doubt on the official story.  I now am certain that they did not hijack the plane by using box cutters.  The passengers would have fought back, for sure, I think.  I have always believed that they must have managed to smuggle weapons in.  And with this video, one has to believe that they managed to smuggle box cutters into the plane after being searched twice just before boarding?