Exit on duty: African leaders who have died in office in the last 20 years

(L-R) Ethiopia's Zenawi, Ghana's John Mills, Libya's Gaddafi, Nigeria's Yar Adua, Gabon's Omar Bongo
(L-R) Ethiopia's Zenawi, Ghana's John Mills, Libya's Gaddafi, Nigeria's Yar Adua, Gabon's Omar Bongo