A young Nigerian girl from the Hausa tribe stands next to the line as her mother joins others queuing to validate their voting cards, at a polling station located in an Islamic school in Daura, the home town of opposition candidate Gen. Muhammadu Buhari, in northern Nigeria Saturday, March 28, 2015. Nigerians went to the polls Saturday in presidential elections which analysts say will be the most tightly contested in the history of Africa’s richest nation and its largest democracy. (AP Photo/Ben Curtis)