Nominated for an Academy Award for Best Documentary Feature in 2016 -- 13th is a thought-provoking documentary that provides an in-depth look at the prison system in the United States and how it reveals the nation's history of racial inequality. Scholars -- activists -- and politicians analyze the criminalization of African Americans and the US prison boom. This film is for mature audiences only and contains violent imagery and language -- and may not be appropriate for those under 15.