Question: In the beginning of the movie, why were the hijackers shaving their chests and genital areas? Is this some kind of religious ritual?
Question: How exactly did Ben Sliney determine from watching the CNN report that the plane had struck the North Tower from the west, based on the position of the sun? Seems a bit of a reach given that there were huge, gaping holes on all 4 sides of the building, and theoretically, any one of those could've been the point of entry for the plane. (00:38:23)
Question: How come the terrorists' knives were not noticed? Airports have metal detectors designed to detect knives.
Question: I know this has nothing to do with movie's plot, but I'm going to ask it anyway. How did the hijackers know that destroying the twin towers would affect the US economy?
Question: In the beginning they say that they are going to be 15 minutes late, but they will make it up because of tailwinds. I thought you only got "good" tailwind when flying from West to East with the Jetstream?