A Nigerian man selling plastic bowls, one with a sticker supporting Muhammadu Buhari, walks on a street in Kano, Nigeria, yesterday. Amid anger over an Islamic insurgency that has claimed thousands of lives, Nigerians threw out the incumbent and elected 72-year-old former military dictator Muhammadu Buhari in a historic transfer of power officially announced early yesterday, following the nation’s most hotly contested election ever.