Sierra Leone/election: vote of opposition candidate Bio Opposition challenger Julius Maada Bio of the Sierra Leone People's Party (SLPP) casts his ballot during the presidential run-off. A wafer-thin margin separated him from the other frontrunner, Samura Kamara of the ruling All Peoples' Congress (APC), after the first round on March 7, adding to tensions in the West African country where political loyalties are often divided along ethnic lines and traumatic memories of civil war run deep. IMAGES AND SOUNDBITE