TOPSHOT - A woman walks past an electoral poster at a market, which was attacked last year by Boko Haram Islamists, in the Nigerian city of Mubi, Adamawa State, on February 15, 2019, on the eve of the country's presidential election. - Nigeria made final preparations on the eve of the presidential election, with candidates pitting continuity against reform in a battle between incumbent Muhammadu Buhari and his main rival Atiku Abubakar. (Photo by Luis TATO / AFP)