U.S. Ambassador to the United Nations Nikki Haley (2nd L, Front) and British Ambassador to the United Nations Karen Pierce (1st L, Front) vote in favor of a Security Council resolution to impose an arms embargo on South Sudan at the UN headquarters in New York, on July 13, 2018. The UN Security Council on Friday adopted a resolution to impose an arms embargo on South Sudan in addition to current sanctions, till May 31, 2019. (Xinhua/Li Muzi)