Ghana's president-elect John Mahama is sworn as president at an inauguration ceremony in the West African nation's capital Accra. Mahama won 56 percent of the vote in the nation's presidential election on December 9, defeating ruling party candidate and Vice President Mahamudu Bawumia, who secured 41 percent. He takes over from outgoing president Nana Akufo-Addo, who served two terms in power. IMAGES