RIO DE JANEIRO, BRAZIL - OCTOBER 08: Black Bloc protesters look at burned buses in Rio de Janeiro's main avenue during schoolteachers demonstrations demanding better wages on October 8th, 2013 in Rio de Janeiro, Brazil.
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RIO DE JANEIRO, BRAZIL - OCTOBER 08: Black Bloc protesters look at burned buses in Rio de Janeiro's main avenue during schoolteachers demonstrations demanding better wages on October 8th, 2013 in Rio de Janeiro, Brazil.