Ian Bremmer shares his insights on global politics this week on World In :60.

What would a ground invasion of Gaza look like?

Two steps here. And I do think it's very likely indeed. The first is the Israelis basically send troops in and divide Gaza in two. They surround Gaza City. They take over the rest of the territory. Small cities lightly populated basically, not urban warfare. That can be done in a matter of probably five days a week. But much longer than that is Gaza City itself. That's where they really get bogged down, take lots of casualties. That could be a matter of a month or even more. And of course, what do you do once you've taken it? No one's answered that.