Members of a teachers union march towards scores of police in riot gear surrounding the office of the National Electoral Institute, in Chilpancingo, Guerrero State, Mexico, Friday.
Members of a teachers union march towards scores of police in riot gear surrounding the office of the National Electoral Institute, in Chilpancingo, Guerrero State, Mexico, Friday. Rebecca Blackwell Associated Press
Members of a teachers union march towards scores of police in riot gear surrounding the office of the National Electoral Institute, in Chilpancingo, Guerrero State, Mexico, Friday. Rebecca Blackwell Associated Press