Hmmm,..bottomline: No matter what procedures or policies are implemented, there will always be a way for a plane to get hijacked.
All they have to do is get familar with those procedures and find a way around them.
As far as the flight crew not being armed. I think this is just nuts. Not only should they be armed, but well trained to use those arms. Covertly sneaking weapons onboard by the flight crew is really not good, but removing the ability to secure a plane they are responsible for is just nuts.
Here is what I would like to see:
1) Flight crews trained in the use of a hand gun.
2) Breathalyzer tests for all flight crews boarding a plane, whether they are flying it or not.
3) A more secure entry/exit to the cockpit area. Heck, 2 plate steel brackets bolted to the air frame supporting a plate steel crossbar would do the trick. The door would need a security hole or camera view to the door so entry could be secure. I like the camera idea better. One that could see the passenger area too would be wise.
I don't like the air marshall idea too much. All this does is to force the terrorists to train better, making it more difficult to stop them in the advent they overcome the marshall.
No matter how good the mouse trap is, the mouse will eventually find a way to get the cheese.