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Turkish President Tayyip Erdogan delivers a speech during the Extraordinary Congress of the ruling AKP in Ankara, Turkey, May 21, 2017. (Xinhua/Mustafa Kaya)

Turkish President Tayyip Erdogan delivers a speech during the Extraordinary Congress of the ruling AKP in Ankara, Turkey, May 21, 2017. (Xinhua/Mustafa Kaya)