My memory can be faulty at times, so please correct me if you like. But.... weren't the weapons (such as they were) on the 9/11 flights used to subdue/control the CREW?
If the crew is not within reach, a terrorist in a sealed container (the plane) is just going to go whacko and start cutting people? Some people seem to think terrorists just want to kill. Well, they do, but they usually have a purpose in mind, it's not just random.
Also, since 9/11, I doubt that an entire planeload of people will now just sit there and wait for the "hijacking" to end. Sure, some will just sit and cry, scream and wring their hands, but SOME will now fight back, and they know they will be backed by the airline, if not a jury.
I'm reasonably certain that TSA has the same idiot people at the scanners that they had pre-9/11, but they've just been (maybe) given a tiny bit of training and a free hand to be even more stupid and obnoxious than they were before. They are poorly paid people who probably don't have much power in their lives otherwise, so they take advantage of the power that the TSA has given them.
One trained dog's nose can find explosives wrapped in plastic, boxes, luggage and most other containers (even within multiple containers), but it's taken the TSA morons FOUR YEARS to figure this out?
However, I do wonder about the purpose of icepicks and throwing stars...
Sue