A man hammers a wall with elections posters at an open market in Kano, Nigeria, on Friday. The country is preparing for presidential elections on Saturday. President Goodluck Jonathan faces former military ruler Muhammadu Buhari and 13 other candidates in what is seen as the closest presidential race since the end of military rule in 1999. Goran Tomasevic/Reuters/Landov hide caption

itoggle caption Goran Tomasevic/Reuters/Landov

The most recent propaganda videos from Boko Haram have higher production values than in the past and other similarities to ISIS-produced videos. Boko Haram/Sendvid hide caption

itoggle caption Boko Haram/Sendvid

Guinea's Grand Imam, El Hadj Mamadou Saliou Camara, tells his fellow clerics: "If there is any doubt at all, then no one must touch the body." Kevin Leahy /NPR hide caption

itoggle caption Kevin Leahy /NPR

Six-year old Hadja Sow (left) and a classmate on their first day back at school after a prolonged break because of Ebola. Ofeibea Quist-Arcton/NPR hide caption

itoggle caption Ofeibea Quist-Arcton/NPR