U.S. Ambassador to the United Nations Nikki Haley (R, Front) talks with British Ambassador to the UN Karen Pierce (L, Front) prior to a Security Council voting on a Russian-drafted resolution on an investigation by the Organization for the Prohibition of Chemical Weapons (OPCW) into the alleged chemical attack in Douma, Syria, at the UN headquarters in New York, on April 10, 2018. The UN Security Council failed to adopt the Russian-drafted resolution on Tuesday. (Xinhua/Li Muzi)