Joshua Oppenheimer blew a lot of minds with his 2013 documentary "The Act of Killing," about some of the men who committed genocide in Indonesia in 1965. Werner Herzog called it "unprecedented in the history of cinema." Now Joshua has delivered a companion piece that's every bit as powerful, if not more so. While "The Act of Killing" explored the killers' own fevered imaginations, "The Look of Silence" offers a survivor's perspective as he confronts the perpetrators. Joshua is not only a brilliant filmmaker but also a deeply insightful and eloquent commentator, and this interview is a must-listen.