This is well worth reading
Some gun-people scoff at civilian counter terrorist training, thinking such tactics are "wishful thinking". I would point out three things to them: One - The only difference between the September 11th planes was that passengers on Flight 93 chose to act. I suspect that had the acted sooner, they may have saved the plane. Two – Unless you act, your life is in the hands of the errorists and we know their plans are for you, you will most definitely be killed. Three – Rescue by the authorities is a pie-in-the-sky feel good notion that will be of little help when your throat gets slashed. Bottom line - You have nothing to lose.