U.S. May Impose Sanctions Against Turkey Over S-400 "Threat" To F-35 The United States continues to consider the S-400 air defense system a threat to its F-35 fifth generation stealth fighter platform, and may impose sanctions against Ankara, Turkey....... https://www.zerohedge.com/news/2018-11-14/us-may-impose-sanctions-against-turkey-over-s-400-threat-f-35