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BRUSSELS, BELGIUM - NOVEMBER 29: Turkish Prime Minister Ahmet Davutoglu (C) and EU Council President Donald Tusk (C-R) talk at the start of an EU-Turkey Summit in Brussels, Belgium, 29 November 2015. (Photo by Mehmet Kaman/Anadolu Agency/Getty Images)

BRUSSELS, BELGIUM - NOVEMBER 29: Turkish Prime Minister Ahmet Davutoglu (C) and EU Council President Donald Tusk (C-R) talk at the start of an EU-Turkey Summit in Brussels, Belgium, 29 November 2015. (Photo by Mehmet Kaman/Anadolu Agency/Getty Images)