Nigeria is Africa’s most populous country and its second largest economy, as well as one of America’s top oil suppliers. Despite a return to civilian government in 1999 after a long spell of military dominance, Nigeria remains a fractious nation, divided along ethnic and religious lines. Nigeria is a country with a history of rigged and violent elections, however, a watershed presidential election held in 2011 April peacefully brought a southerner to power many years since the end o...