Since you already know, spill the beans.
First. They didn't ban box cutters...They banned just about everything...Toenail clippers even. That's an important distinction to make because the reason box cutters weren't outlawed then is because the blades are so short. Prior to 911 you could have a pocket knife on a plane because nobody would try to hijack a plane with something like that.
Except they did...They did and were successful because prior to that time the conventional wisdom was for hostages to always give in to the terrorists demands. Not worth being hurt/killed...Sit tight and let the authorities handle it.
They could have had the aforementioned toenail clippers...If they put on a scary enough show the hostages involved would sit down and do as they were told. The locked cockpit door would have been quickly opened by the pilots because they are responsible for the passengers safety...Even from toenail clippers. Not one passenger shall have a drop of blood shed by toenail clippers...It was corporate policy.
That changed when the passengers of Flight 93 realized what was going on and decided if they did not fight back they were dead anyway. Unfortunately, they realized it too late to save themselves.
Since that time we have strong doors
which don't get opened and
no boxcutters.
But that's not why there hasn't been a repeat. Boxcutters are a distraction. The door is an irrelevancy. If a guy got on a plane today with a box cutter and got into the cockpit the passengers would beat him to death. THAT is what changed....Not the equipment...Not the restrictions.
The TSA is a HUGE waste of money and nothing but harassments to travelers.
That one guy standing up and snatching Meal Team Six to the ground in the Colorado night club did more to stop the attack and derail anyone planning another than all of the laws you could ever pass.
If Meal Team Six couldn't have gotten a gun maybe he would have torched the place when it was full (doors are easy to chain)...Or drove a truck full of chlorine gas tanks into the place.
The consequences of banning cheap handguns were increased burglaries targeting firearms & every crook toting a nice reliable Glock rather than a cheapo Raven .25ACP.
Everything has it's consequences...