I mentioned a few weeks ago about Russia's military build up in Syria and wondered how the US led coalition would deal with it. The US went from 'no deal' to 'maybe we will talk' to 'talking", UN type talking.
Today there was a knock on the door. A Russian emissary announced that they would begin air strikes in one hour.
Then they did - about 20 missions - and not a thing the US could do to stop them.
Despite what is going on it n the UN the Russian message seems clear: "Get with us or stay out of our way."