Nigerian electoral officials collate results at a polling station in the oil rich Niger Delta, Port Harcourt, Nigeria on Sunday. Millions of voters headed to the polls in the Nigerian general elections after being delayed for over a month. Tife Owolabi/EPA/Landov hide caption

itoggle caption Tife Owolabi/EPA/Landov

Nigeria's President Goodluck Jonathan, left, and opposition candidate Gen. Muhammadu Buhari, right, prepare to sign a renewal of their pledge to hold peaceful "free, fair, and credible" elections, at a hotel in the capital Abuja, Nigeria, on Thursday. Ben Curtis/AP hide caption

itoggle caption Ben Curtis/AP

Somali soldiers take position after a bomb was detonated at the gate of one of Mogadishu's most popular hotels Friday. Police said a suicide bomber detonated his explosives-laden car at the hotel gate. Farah Abdi Warsameh/AP hide caption

itoggle caption Farah Abdi Warsameh/AP

A man hammers a wall with elections posters at an open market in Kano, Nigeria, on Friday. The country is preparing for presidential elections on Saturday. President Goodluck Jonathan faces former military ruler Muhammadu Buhari and 13 other candidates in what is seen as the closest presidential race since the end of military rule in 1999. Goran Tomasevic/Reuters/Landov hide caption

itoggle caption Goran Tomasevic/Reuters/Landov

The Grand Ethiopian Renaissance Dam is under construction near Assosa, Ethiopia. When it's completed, the dam will have be able to produce 6,000 megawatts of electricity, making it the biggest hydroelectric power station in Africa. Elias Asmare/AP hide caption

itoggle caption Elias Asmare/AP