The stakes in Syria just jumped mighty high. Syrian troops attacked the anti-ISIS fighters we back. We warned them to knock it off. In reply, a Syrian aircraft struck our allies. An American jet shot it down. Now the Russian government says it will view as hostile any manned aircraft or drone flying west of the Euphrates River. That means us.
http://nypost.com/2017/06/19/the-stakes-in-syria-now-include-us-russia-war/