Bolivia's presidential candidate Samuel Doria Medina holds final rally ahead of election | AFP

Bolivia's presidential candidate Samuel Doria Medina holds his final campaign rally in El Alto, ahead of the August 17 election. Right-wing ex-president Jorge "Tuto" Quiroga and center‑right business tycoon Samuel Doria Medina, both of whom are on their fourth attempts at the presidency, are neck‑and‑neck in opinion polls, trailed by six other hopefuls.