9/10: Chicago teachers go on strike; Cancer recognized as ground zero side effect

      |President Obama spoke with Scott Pelley on Washington's gridlock and what would be any different in a second Obama term with a Republican majority in the house; Then, teachers in America's third largest school district have gone on strike after negotiations between the union and the city of Chicago broke down; Also, a wide range of cancers have been added to the official roster of World Trade Center related health conditions.

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