In this Aug. 12, 2015 photo provided by the United Nations, U.N. Secretary-General Ban Ki-moon speaks to the media at U.N. headquarters on allegations of sexual exploitation and abuse of civilians by U.N. forces, particularly in the Central African Republic. During Ban’s second term as Secretary General, the U.N.’s failure to deal effectively with sexual abuse by U.N. peacekeepers in the Central African Republic and elsewhere have been widely criticized.