we ain't gonna lose any cities... they don't have the bomb... don't you think we would of seen it by now?
Sooner or later, they will get lucky and get hold of a few kilos of anthrax, or a bit of smallpox, or crash an LNG tanker into a downtown, etc. Or they will succeed with the next Operation Bojinka and smuggle bombs onto 20 passenger jets, all set with timers to go off at the same second. (2# of semtex in a shaving cream can with a casio watch timer, for instance.) Sooner or later, their most evil fantasies of destruction of the West are going to succeed. They won't stop until we stop them. What will stop them is pricking the bubble of their insane murder cult, the talisman of omnipower which motivates them, the black moon-god rock.
It may take years, but that is the end game, IMHO.