"Nigeria's President Goodluck Jonathan, center-left, and opposition candidate Gen. Muhammadu Buhari, center-right, hug and shake hands after signing a renewal of their pledge to hold peaceful ""free, fair, and credible"" elections, at a hotel in the capital Abuja, Nigeria Thursday, March 26, 2015. Nigerians are due to go to the polls to vote in presidential elections on Saturday. (AP Photo/Ben Curtis)"
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