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District 21 of the Chicago Police Department is made up of two distinctly different groups. There are the uniformed cops who patrol the beat and go head to head with the city's street crimes. And there's the Intelligence Unit, the team that combats the city's major offenses - organized crime, drug trafficking, high profile murders and beyond. These are their stories.

No job is more stressful, dangerous or exhilarating than those of the Firefighters, Rescue Squad and Paramedics of Chicago Firehouse 51. These are the courageous men and women who forge headfirst into danger when everyone else is running the other way and whose actions make the difference between life and death. These are their stories.

Inspired by ESPN's anniversary, ESPN Films is launching 30 for 30, an unprecedented documentary series featuring 30 of today's finest storytellers telling thirty remarkable stories from the ESPN era. On their own, each of the films will be an intimate look at a specific story, relevant to larger themes from the modern era. Collectively, these films will be a diverse mosaic of what sports has meant to American and World culture in the last thirty years. Each storyteller will bring their passion and personal point of view to their film detailing the issues, trends, athletes, teams, rivalries, games and events that transformed the sports landscape from 1979 to 2009.

In a ruined and toxic future, thousands live in a giant silo deep underground. After its sheriff breaks a cardinal rule and residents die mysteriously, engineer Juliette starts to uncover shocking secrets and the truth about the silo.

In the criminal justice system, sexually-based offenses are considered especially heinous. In New York City, the dedicated detectives who investigate these vicious felonies are members of an elite squad known as the Special Victims Unit. These are their stories.