On the other hand, accountability is a good thing and some changes definitely appropriate. But one of these is to become more hardnosed towards terrorists. Terrorists did this horribly immoral murderous thing, and are trying to do more. Clarke's implication seems to be that the USA government must play perfect defense. It is impossible. We have to take the fight to the terrorists, and there must be worldwide unmuted moral outrage at their acts.
Very thoughtful and insightful comments, and I agree with every one of them. Clarke apparently had some talent at what he did, but he is prissy and sanctimonious, not good traits in anyone, but especially unattractive in a man.