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Photo by: Sitthixay Ditthavong

Chicago Teachers Union President Karen Lewis (right) tells reporters at a news conference outside the union's headquarters that the city'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' contracts on Sunday, Sept. 9, 2012, in Chicago. (AP Photo/Sitthixay Ditthavong)

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