The S-400: Erdogan’s Fail-safe

Moscow and Ankara continue to signal that the $2.5-billion sale of four S-400 anti-aircraft batteries will proceed

• Boris Zilberman
• Foundation for Defense of Democracies 

While questions remain about when delivery will occur and under what conditions, both sides have an overriding interest in seeing the deal through.

President Vladimir Putin wants the deal not only for monetary reasons, but also to chip away at NATO unity and to validate such sales to other nations traditionally aligned with the West.

For President Recep Tayyip Erdogan, the acquisition of the system enhances both Turkey’s military capabilities and…

• The S-400: Erdogan…