A Nigerian United Nations peacekeeper stands guard at a rally for incumbent Liberian President Ellen Johnson-Sirleaf in Monrovia November 6, 2011. Johnson-Sirleaf urged voters on Saturday to ignore a poll boycott called for by her rival, saying the move was illegal and intended to intimidate Liberians. REUTERS/Finbarr O'Reilly (LIBERIA - Tags: POLITICS CIVIL UNREST ELECTIONS MILITARY)