UN chief warns of full-blown military escalation in Syria

British Ambassador to the United Nations Karen Pierce (L, Front), French Ambassador to the United Nations Francois Delattre (C, Front) and U.S. Ambassador to the United Nations Nikki Haley (R, Front) talk before a Security Council meeting at the UN headquarters in New York, on April 13, 2018. UN Secretary-General Antonio Guterres on Friday warned of the danger of a full-blown military escalation in Syria. (Xinhua/Li Muzi)