Activist Bayard Rustin points to a map during a press conference four days ahead of the March on Washington in August 1963. AP hide caption

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The last high rise at Chicago's Cabrini-Green public housing complex was demolished in 2011. M. Spencer Green/AP hide caption

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Protesters of Chicago Mayor Rahm Emmanuel's plan to close dozens of city schools rally in the Capitol rotunda in Springfield, Ill., on Wednesday. The Chicago Board of Education voted to close 50 schools. Seth Perlman/AP hide caption

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"Sue," the Tyranosaurus rex skeleton, is one of the most famous exhibits at Chicago's Field Museum of Natural History John Zich/AFP/Getty Images hide caption

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