Muhammadu ##wa tells CNN 's president Amanpour that he will fight corruption in Nigeria . Nigeria is the most populous country in Africa and is grappling with violent Boko Haram extremists . corruption is also Africa 's biggest crime , but up to 70 % of Nigerians live on less than a dollar a day .
Muhammadu Buhari tells CNN 's Christiane Amanpour that he will fight corruption in Nigeria . Nigeria is the most populous country in Africa and is grappling with violent Boko Haram extremists . Nigeria is also Africa 's biggest economy , but up to 70 % of Nigerians live on less than a dollar a day .