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ISTANBUL, TURKEY - NOVEMBER 21: United States Deputy Secretary of State Antony Blinken (2nd L) visits a school for Syrian Refugee Children, financed by Catholic Relief Services and CARITAS, in Istanbul, Turkey on November 21, 2015. (Photo by Onur Coban/Anadolu Agency/Getty Images)

ISTANBUL, TURKEY - NOVEMBER 21:  United States Deputy Secretary of State Antony Blinken (2nd L) visits a school for Syrian Refugee Children, financed by Catholic Relief Services and CARITAS, in Istanbul, Turkey on November 21, 2015. (Photo by Onur Coban/Anadolu Agency/Getty Images)