In 2018, American missionary John Chau was killed while attempting to contact and convert the Sentinelese, a group of people who have lived in voluntary isolation for centuries. A new documentary explores what led Chau to believe it was his duty to convert the people of North Sentinel Island, and looks back at the ways missionary work has been misguided, and even harmful, throughout history. Directors Amanda McBaine and Jesse Moss join us to discuss their film, "The Mission," which premieres in theaters today.