maximum pressure campaign but as we are witnessing with not much success so far our washington responds all over salad of the storyboards tonight all over thank you all the leaders of turkey russia and iran met today in the turkish capital ankara for a summit on syria s push on that final rebel on glee. sublight amir putin and hassan rouhani say they support syria s president bashar al assad and his offensive that offensive has gained momentum in recent weeks split turkish president air to one he s concerned that the fighting will cause a renewed influx of refugees into his country the turkish army has observation post to enforce a buffer zone which was agreed to last year but syrian forces continue to advance with the help of russian airstrikes. let s get more now with our correspondent yulia hawn she s standing by it is still good evening to you why is the turkish president everyone so determined to stop more refugees from coming to turkey.