PDP Presidential candidate and main opposition leader Atiku Abubakar (centre) leaves the polling station with his wife Amina Titilayo Atiku-Abubakar (right) after casting their votes at Agiya polling station in Yola, Adamawa State, Nigeria on February 23, 2019. Mr Abubakar has vowed to challenge Buhari's re-election in court. PHOTO | LUIS TATO | AFP



