Ian Bremmer joins us from Ethiopia to help us make sense of global political tensions and their origins.

What repercussions will Iran face in the aftermath of shooting down a Ukrainian passenger plane?

Well, big repercussions internationally because the Europeans, the Canadians, plenty met. They lied about it before they finally said, OK. Tried to cover it up. And that means it's going to be much tougher to keep them onside in terms of this Iranian nuclear deal that the Iranians themselves are increasingly pulling away from. Also, big demonstrations on the ground in Iran. That's bad for the Iranians, of course, the worst week they've had in decades.