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Turkish President Recep Tayyip Erdogan (R) and his Iranian counterpart Hassan Rouhani shake hands during a welcoming ceremony at the Presidential Palace in Ankara, Turkey, on Dec. 20, 2018. (Xinhua/Mustafa Kaya)
Turkish President Recep Tayyip Erdogan (R) and his Iranian counterpart Hassan Rouhani shake hands during a welcoming ceremony at the Presidential Palace in Ankara, Turkey, on Dec. 20, 2018. (Xinhua/Mustafa Kaya)