In Nigeria, here are 10 of the most influential and powerful kings, in no particular order: 10. ... The King of Nnewi is called the Obi as it is in the Igbo culture.

Nigeria's President Muhammadu Buhari has been off work for longer than he's been in office this year. The 74-year-old leader has been on sick leave in the U.K. since May 7.