U.S. ambassador to the United Nations (UN) Nikki Haley (L) speaks at a Security Council meeting on the situation in Syria's Idlib province at the UN headquarters in New York, on Sept. 11, 2018. As a seemingly imminent full-scale offensive on Syria's Idlib province looms, the UN Security Council on Tuesday remained deeply divided, prompting a no-escalation plea from Secretary-General Antonio Guterres. (Xinhua/Li Muzi)