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A tentative contract was reached between the Chicago Teachers Union and the Chicago Public Schools. But just in case things didn't work out, stacks of picket signs were ready for pick-up outside the union's strike headquarters on Monday. Charles Rex Arbogast/AP hide caption

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Charles Rex Arbogast/AP

A Chicago police officer takes several protesters into custody on Wednesday, during an act of civil disobedience during a march and demonstration of opponents to a plan to close 54 Chicago Public Schools. Charles Rex Arbogast/AP hide caption

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Charles Rex Arbogast/AP