Over the past fifty-one years, he has produced and directed forty-two documentaries, including “Titicut Follies,” about a state prison for the criminally insane, which was banned from public screenings by the Supreme Court of Massachusetts until 1991; “Basic Training,” which follows a group of enlisted soldiers and was filmed the summer after the first Vietnam draft lottery; “High School,” which takes a look at the relationship between teachers and students in a Philadelphia public school; and, most recently, “Ex Libris—The New York Public Library,” which was released last year. He has received many awards, including a Lifetime Achievement Emmy Award, an Honorary Award from the Academy of Motion Picture Arts and Sciences, and the Golden Lion for Lifetime Achievement Award at the Seventy-first Venice International Film Festival.