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

itoggle caption M. Spencer Green/AP

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

itoggle caption Seth Perlman/AP

"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

itoggle caption John Zich/AFP/Getty Images

First lady Michelle Obama on Wednesday speaks about 15-year-old Hadiya Pendleton, who was shot and killed on the South Side of Chicago earlier this year. Paul Beaty/AP hide caption

itoggle caption Paul Beaty/AP

Ebert works in his office at the WTTW-TV studios in Chicago on Jan. 12, 2011. Charles Rex Arbogast/AP hide caption

itoggle caption Charles Rex Arbogast/AP