In light of Turkey’s purchase of the Russian S-400 missile defense system, the United States and its other NATO allies have questioned Turkey’s commitment to the alliance. Retired Lieutenant General Ben Hodges, former commanding general of the United States Army Europe and Pershing Chair in Strategic Studies at the Center for European Policy Analysis, and MEI’s Gonul Tol join host Alistair Taylor to discuss the reasons for President Erdogan’s decision and what it means for the future of U.S.-Turkey relations.