Fox News, citing U.S. officials, is saying that Russia has deployed it S-300VM air defense missile system to Syria.
By Vitaly V. Kuzmin (http://vitalykuzmin.net/?q=node/521) [CC BY-SA 4.0 or CC BY-SA 4.0], via Wikimedia Commons
Two officials were quoted as saying that the system’s components were seen arriving at the Russian naval facility in Tartus over the weekend. Its journey from Russia was tracked by U.S. intelligence community.