AdvertisementAmid Violence, Nigerians Go To The Polls To Choose A PresidentMarch 28, 2015Scott NeumanfacebookEmailNigeria'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. (AP)