In this Tuesday, Dec. 20, 2016 file photo, Iranian Foreign Minister Mohammad Javad Zarif, left, Russian Foreign Minister Sergey Lavrov, center, and Turkey’s Foreign Minister Mevlut Cavusoglu, attend a joint news conference after their talks in Moscow, Russia. With his victory in Aleppo, Syrian President Bashar Assad appears to have survived a nearly six-year war to drive him from power, but he is now more dependent on outside powers than ever.