By most accounts, President Trump and President Erdogan had a productive meeting in the White House last month. Several major business deals were agreed, including cooperation on civilian nuclear energy. Russia’s invasion of Ukraine and the future of Syria were also on the agenda.

Another topic that received considerable attention was U.S.-Turkish defense cooperation. In recent years, Turkey’s domestic defense industry has gone global. Turkish weapons—especially drones—are sought after from Asia to Africa to Europe. While U.S.-Turkish defense cooperation remains healthy, there is plenty of room for growth. But one sticking point still needs to be resolved to take the relationship to the next level: Turkey’s acquisition of the Russian-made S-400 air defense system and its subsequen

See Full Page