UN Secretary-General Antonio Guterres speaks in remembrance of fallen colleagues during the 2003 attack targeting the UN Assistance Mission in Iraq, at the UN headquarters in New York, Aug. 17, 2018. UN Secretary-General Antonio Guterres on Friday laid a wreath at the UN headquarters for his colleagues killed in the Aug. 19, 2003 attack in Iraq that prompted the designation of the International Humanitarian Day. (Xinhua/Li Muzi)