Turkey or Russia need to back off a bit with the rhetoric and also the blatant military showboating before it gets out of hand. Those tanks will look like a provocative act to Putin and he will counter those tanks with military hardware of his own.
Putin is not the kind of man to back down to anyone so its up to Erdogan to make the first move, If he doesn't the Russian bear will be having a slap up dinner and on the menu will be Turkey.
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