I guess it depends on what the goals are. I suspect that nein-won-won was intended to show us that they could mess with us, too. If you can call that a political goal I would say that terrorism was an effective tool for achieving it. I think that all the curtailment of liberties and general inconvenience at the point of an implied gun that we put up with is more of a reflection of our collective ignorance and laziness than evidence of the efficacy of terrorism ...