UN envoy warns of escalation in and beyond Syria

United Nations Special Envoy for Syria Staffan de Mistura (front, on screen) briefs the UN Security Council meeting on the situation in Syria at the UN headquarters in New York, April 9, 2018. The Security Council held an emergency session on the situation in Syria, particularly after reports of the use of chemical weapons over the weekend in rebel-held Douma near the capital city of Damascus. (Xinhua/Li Muzi)