Opposition challenger Muhammadu Buhari has won Nigeria's presidential elections, ousting the incumbent Goodluck Jonathan. Three decades after seizing power in a military coup, Buhari has now come to power via the ballot box. He is now in charge of Africa's biggest economy and one of its most turbulent democracies. Supporters of Muhammadu took to the streets to celebrate the elections, whild supporters of Goodluck Jonathan charge corruption. teleSUR