Since we seem to have revisionist theory in play here, what is untrue about the statement that five hijackers on three planes and four on another killed crew members and gained control by using small knives and box cutters?
And is it the feeling here that the reinforced cockpit door and the occasional presence of an air marshal now changes the dynamic sufficiently so that a small knife presents no danger in and aircraft in flight?
No revisionist history. They used box cutters as well as pepper spray and the threat that they had bombs, as well as access to the cockpit to take the plane.
Once in control, they used the passengers' beliefs that they were the ones that had value as hostages against them until it was too late when the truth was that the terrorists only valued the plane as a weapon. It wasn't as simple as five nutjobs waving some box cutters around and seizing the aircraft. They knew our psychology at the time and were well prepared.
In 2013, terrorists can have all of the box cutters they want and they aren't taking control of anything.
Now, the reason that I'm not taking a side on the issue and, in fact, am leaning towards NOT allowing knives on planes is the simple fact that, while a terrorist will never take control of a plane in flight, he can still attempt
to do so and, with a weapon, can still harm passengers until he is inevitably subdued.