Nigeria's president-elect Bola Tinubu delivers a victory speech in Abuja after winning the highly disputed weekend election, securing the former Lagos governor his life-long ambition of the presidency of Africa's most populous democracy. "This is a serious mandate. I hereby accept it," says Tinubu. "I take this opportunity to again appeal to my fellow contestants, to let us team up together. It is the only nation we have." IMAGES AND SOUNDBITES