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Vigilantes Strike Back Against Mexican Cartels

The self-defense groups that have emerged in the western Mexican state of Michoacan are on the public relations offensive. They've been posting videos on Twitter and Facebook condemning the Knights Templar drug traffickers and exalting their own crusade to expel the cartel from their towns and businesses. Meanwhile, federal officials don't seem to know how many of these vigilantes there are and have halted efforts to disarm them.