From Tyler Durden at zerohedge.com:
As reported two days ago, one of the first decisions a very angry Russia took in the aftermath of the shooting down of its Su-24 by a Turkish F-16 was to dispatch a Moskva guided-missile cruiser off the coast of Syria to provide air cover for its jets operating near Latakia, as well as send an unknown number of ultramodern S-400 (or SA-21 Growler in NATO designation) SAM batteries to Latakia to make sure that the tragic incident from Tuesday never repeats itself by sending Turkey a very clear message that the next time a Turkish warplane engages a Russian jet, Russia will immediate retaliate using ground forces.
Earlier today, Russia made a very explicit demonstration of the deployment of at least two S-400 batteries at Syria’s Khmeimim airbase, with the Russian Ministry of Defense promptly publicizing the arrival with the following clip.
With a range of 250 miles, the S-400 could easily strike Turkish targets, and as the map below shows, Russia could even take down targets over northern Israel. As cited by the Independent, Nick de Larrinaga, Europe editor of the defense magazine IHS Jane’s Defense Weekly, said it would be “a significant increase” in the reach of Russian air-defense capacities. “The message that the Russians are trying to send is that they’re capable of defending themselves in Syria, should the situation escalate.”

Needless to say, the US was not enthused and earlier today the US embassy in Moscow said that the “Russian deployment of the S-400 air-defense system to Syria won’t aid the fight against the Islamic State, with the US diplomat adding that the US is hopeful Russia won’t use the system to target planes flown by international coalition since Islamic State doesn’t have air force.” Clearly a warning to Putin not to dare use the rockets against Turkish (or other coalition) jets.
To continue reading: Putin Accuses Obama Of Leaking Flight Details To Turkey