United Nations Secretary-General Antonio Guterres (R, Front) and African Union (AU) Commission Chairperson Moussa Faki Mahamat (L, Front) attend a joint press conference at the UN headquarters in New York, on May 6, 2019. United Nations Secretary-General Antonio Guterres and African Union (AU) Commission Chairperson Moussa Faki Mahamat on Monday welcomed the strong cooperation and collaboration between the two organizations. (Xinhua)