“13” is an Oscar-nomintated documentary about mass incarceration in the U.S., racism, and the criminalization of African Americans, directed by Ava DuVernay (“Selma”). Discussion followed with: Professor Jelani Cobb, Columbia Journalism School Professor Geraldine Downey, Columbia University Department of Psychology, Center for Justice Professor Jeffrey A. Fagan, Columbia Law School and Mailman School of Public Health Michelle Miller (Moderator), CBS News.