9-11 Commission Report
One disturbing theme is emerging from 9-11 report, I am on page 50 or so.

"There was no training for this type of attack."

In warfare the "element of surprise" is understood to be something that is desirable to achieve. Should "this never happened before" be an excuse for failure to protect? Consider that there are an infinite number of ways for us to be surprise attacked. If we can only defend against attacks that we are trained for then we can never be safe.

Also, there are basic failures in communication and responsiveness that would seem to apply in any kind of attack, regardless of how well trained for a specific attack.

Maybe the training needs to become more generalized. Start with the assumption that the attack will some kind of a surprise that we are not prepared to handle, and go from there.