Does ISIS Want a War with the West?

Authorities now agree that Friday's assault on Paris was directed by ISIS in Syria, and it's widely expected that ISIS will strike again. It's not clear if a bold, new international offensive is under way or if ISIS is a losing movement trying to make itself relevant to the rest of the world. The danger is real either way, but there's dispute about how to respond — and how to prevent attacks in the future. The options include open warfare, invasive surveillance and diplomacy by Western powers and, more importantly, Syria's neighbors in the Middle East.