Iran said to Russia: ‘The main weak point of the United States in the world is the Middle East region, and we are able to weaken it to a greater extent if we were to cooperate … This is the specific point that ‘clicked’ for President Putin, and so he took the decision at that time to come to Syria, after he took guarantees that the Resistance (Axis) is the one that will work on the ground, while (Putin) is to take care of the air power … The second point which convinced (Putin) of this alliance is the issue of terrorism … and so President Putin had said on many occasions that ‘we are fighting them in Syria so that they do not come to us’. “

Link to original source: http://middleeastobserver.net/video-senior-analyst-close-to-hezbollah-on-reality-of-russian-alliance-with-iran-resistance-axis-english-subs/