In 2014, Ava DuVernay she earned raves for her civil rights drama "Selma," which was up for an Oscar for Best Picture. Her latest project is a documentary that's on the shortlist for Oscar consideration. It's called "13th," and it's a scathing primer on how America came to incarcerate more people than any other country on Earth, many of whom happen to be of color. The director examines why the criminal justice system captures her imagination, before revealing the surprising film she's seen many, many times.
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