Ghanaian President Nana Akufo-Addo (4th L, front) and United Nations Secretary-General Antonio Guterres (3rd L, front) attend the state funeral of former UN Secretary-General Kofi Annan in Accra, Ghana, on Sept. 13, 2018. A number of African and world leaders joined Ghanaian President Nana Akufo-Addo here on Thursday to bid farewell to former United Nations Secretary-General Kofi Annan, who passed away in Switzerland on Aug. 18. (Xinhua/Fred Bonsu)