UK's permanent representative to the UN Matthew Rycroft (L, front), French UN Ambassador Francois Delattre (C, front) and U.S. ambassador to the UN Nikki Haley (R, front) talk before voting on a UN Security Council draft resolution aiming to establish a sanctions regime over use of chemicals weapons in Syria at the UN headquarters in New York, on Feb. 28, 2017. The UN Security Council on Tuesday failed to adopt a draft resolution aiming to establish a sanctions regime over use of chemicals weapons in Syria as Russia and China vetoed it. (Xinhua/Li Muzi)