U.S. Ambassador to the United Nations Nikki Haley (R rear), whose country is taking over the presidency of the Security Council for September, attends a press briefing at the UN headquarters in New York, Sept. 4, 2018. The UN Security Council will discuss the situation in Idlib, the last major rebel stronghold in Syria, on Friday, said Nikki Haley. (Xinhua/Li Muzi)