Exuberant Crowds Celebrate Ex-Dictator's Election VictoryOpposition candidate Muhammadu Buhari, a former military dictator, became the first Nigerian to oust a president through the ballot box.Supporters of opposition candidate Muhammadu Buhari celebrate an anticipated win for their candidate in Kano, Nigeria, on March 31. Ben Curtis / APPrintApril 1, 2015, 1:11 AM UTC / Updated April 1, 2015, 1:11 AM UTC / Source: NBC News