Putin called today’s downing of a Russian Su-24 by a Turkish F16 a “stab in the back” but it this was certainly not an unproved attack. In fact it follows countless warnings from Turkey that violations of its airspace (and aggression against its interests on its border) will not go unchecked. Terrorism analyst and counterintelligence pro William J. Tucker joins me again for a look at this event, the circumstances that got us here, and where we might be going.

You can follow William on Twitter @tuckerwj.