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Ghanaian President Nana Akufo-Addo (2nd L) lays a wreath for former UN Secretary-General Kofi Annan during Annan's state funeral 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)