Chicago Teachers Union President Karen Lewis, right, tells reporters at a news conference outside the union&#x27;s headquarters that the city&#x27;s 25,000 public school teachers will walk the picket line Monday morning after final-day talks with the Chicago Board of Education failed to reach an agreement over teachers&#x27; contracts on Sunday, Sept. 9, 2012 in Chicago. (AP Photo/Sitthixay Ditthavong)
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