“We’ve gone through these episodes ourselves,” President Obama said Friday afternoon in explaining how the “heartbreaking” events in Paris were resonating with Americans. Well, no, we haven’t. We haven’t been through an episode of this kind, ever. We haven’t had a soccer stadium bombed and a concert venue occupied and three gathering places shot up simultaneously. We have not experienced urban warfare executed by a terrorist organization using a combination of suicide bombers and gunmen. We’ve had 9/11, and we had the Tsarnaev brothers, and we’ve had lone shooters. Combining these approaches is a horror we’ve yet to undergo. About these things, we are innocents.

The question is how much longer we will be. If one assumes this was an ISIS operation, that would mean the group may be engaged in a systematic effort against countries that have announced a common goal of extirpating it. And it may be doing so on an accelerated schedule. Two weeks ago, ISIS apparently took down a Russian airliner. Yesterday, it went wild in Paris. Where next? Germany? Australia? Turkey?