Africa In historic first, Nigeria's former dictator Buhari beats incumbent president (+video)

President Goodluck Jonathan conceded the election to Muhammadu Buhari in a move that could dissuade post-election violence. Buhari has called for peaceful celebrations from his supporters. 

Ben Curtis/AP

Gen. Muhammadu Buhari was announced as Nigeria’s new president on Tuesday in a stunning victory after a draining and dramatic election in Africa’s richest and most populous nation.