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ANKARA, TURKEY - MARCH 02: U.S. Special Representative for Syria, James Jeffrey and U.S. Ambassador to the United Nations, Kelly Craft (not seen) arrive in Ankara, Turkey on March 02, 2020, amid escalation in northwestern Syria. (Photo by Metin Aktas/Anadolu Agency via Getty Images)

ANKARA, TURKEY - MARCH 02: U.S. Special Representative for Syria, James Jeffrey and U.S. Ambassador to the United Nations, Kelly Craft (not seen) arrive in Ankara, Turkey on March 02, 2020, amid escalation in northwestern Syria. (Photo by Metin Aktas/Anadolu Agency via Getty Images)