On Monday the United States announced it is imposing sanctions on Turkey for its purchase and acquisition of Russian S-400 missile defense systems. This is the first time the US has targeted a NATO ally through the Countering America's Adversaries Through Sanctions Act. Dr. Aykan Erdemir, the Director of the Turkey Program at the Foundation for Defense of Democracies and a former Turkish lawmaker, and HALC’s Executive Director Endy Zemenides join The Greek Current to analyze this breaking development.