Parents, students and supporters of Chicago Public Schools teachers gather at a press conference in 2016 near Mayor Rahm Emanuel's home. Jose M. Osorio/Chicago Tribune/Chicago Tribune/TNS via Getty Images hide caption

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Chicago police announced on Sunday the arrest of a 14-year-old boy in connection with the sexual assault of a 15-year-old girl that was streamed live on Facebook. Above, Chicago Police Superintendent Eddie Johnson talks to reporters at the scene of a triple shooting in the North Lawndale neighborhood in February. Joshua Lott/AFP/Getty Images hide caption

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If Chicago, the fifth most racially and economically segregated city in the country, were to lower its level of segregation to the national median of the 100 largest metropolitan areas in the country, it would have a profound impact on the entire region. Scott Olson/Getty Images hide caption

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Jerusha Hodge is among the handful of CeaseFire outreach workers who work to curtail violence in three South Side Chicago neighborhoods. Hodge says shootings are down in the areas where CeaseFire has a presence. Cheryl Corley/NPR hide caption

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Cheryl Corley/NPR

Treat Gun Violence Like A Public Health Crisis, One Program Says

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A Caterpillar excavator operates on a construction site in Miami Beach, Fla. Wilfredo Lee/AP hide caption

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Wilfredo Lee/AP

When Caterpillar Leaves Peoria, What Will Become Of The Town?

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There was a huge jump last year in the number of murders in Chicago. As young people are affected by the gun violence, community leaders look for answers. Scott Olson/Getty Images hide caption

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In Bid To Curb Violence, Chicago Gets Some Ideas From Teens Behind Bars

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Chicago police officials ride bikes by a broadcast of President Trump's inaugural address on Jan. 20. The president has threatened to "send in the Feds" to intervene in the city's law enforcement. Nam Y. Huh/AP hide caption

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Attorney General Loretta Lynch, in Chicago on Friday, announces the release of a Department of Justice report citing widespread abuses by officers in the Chicago Police Department. The report is the result of a 13-month investigation. Scott Olson/Getty Images hide caption

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President Obama waves to supporters at an election night party in Chicago to proclaim victory in the 2012 presidential election. Carolyn Kaster/AP hide caption

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Before Farewell Speech, Chicagoans Reflect On President Obama's Legacy

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A screenshot shows the Chicago Police Department's Wednesday news conference, where Police Superintendent Eddie Johnson (left) discussed a violent attack that was live-streamed on Facebook. Johnson called the assault "sickening." Courtesy of Chicago Police Department hide caption

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Courtesy of Chicago Police Department

Employees hand-finish cheesecakes on the production line at Eli's in Chicago. Deborah Amos/NPR hide caption

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Refugees Resettled In Chicago Help Make Its Most Famous Cheesecake

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Friends and family members attend a memorial service for 17-year-old twin brothers Edward and Edwin Bryant who were shot and killed in October. Chicago has logged more than 700 homicides this year, more than any other major U.S. City Scott Olson/Getty Images hide caption

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Gun Deaths In Chicago Reach Startling Number As Year Closes

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A woman talks with members of the Chicago Police Department at the scene where at least six people were shot on Sunday. Dozens of people were shot over the holiday weekend in Chicago. Armando L. Sanchez/Chicago Tribune/TNS via Getty Images hide caption

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Armando L. Sanchez/Chicago Tribune/TNS via Getty Images

Over Holiday Weekend, Dozens Shot In Chicago; At Least 11 Killed

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To be clear, this squirrel — photographed in 2008 — is not the one that threw itself at a Chicago alderman's bicycle earlier this month. Taylor L. Riché/Flickr hide caption

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Fans celebrate outside Wrigley Field as buses carrying the Chicago Cubs baseball team arrive in Chicago early Thursday, Nov. 3, 2016, after the Cubs defeated the Cleveland Indians 8-7 in Game 7 of the World Series in Cleveland. Matt Marton/AP hide caption

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Matt Marton/AP

2016 World Series Brought Welcome Levity To Weary Cities

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Passengers walk away from an American Airlines jet that aborted a takeoff and caught fire at Chicago's O'Hare International Airport. No serious injuries were reported. Jose Castillo/AP hide caption

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Police tape is displayed at a crime scene in Chicago where a 16-year-old boy was shot in the head and killed and another 18-year-old man was shot in April. Joshua Lott/Getty Images hide caption

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Mayor Rahm Emanuel presides over the Chicago City Council meeting on Wednesday. The plan to revamp the city's system of investigating police won approval Wednesday. Antonio Perez/Chicago Tribune/TNS via Getty Images hide caption

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Antonio Perez/Chicago Tribune/TNS via Getty Images

Chicago City Council Approves Oversight Agency To Police The Police

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Demonstrators calling for an end to gun violence and the resignation of Mayor Rahm Emanuel march through downtown Chicago on December 31. More than 500 Chicagoans have been killed so far in 2016. Scott Olson/Getty Images hide caption

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