Close Watch

On today’s show: Frontline producer Martin Smith describes his investigation into why the U.S. Department of Justice has failed to act on what many argue is credible evidence of crimes on Wall Street. Peter Yost talks about his NOVA documentary “Rise of the Drones,” about how robots are revolutionizing warfare. New Yorker writer Margaret Talbot tells us about the life and career of her father Lyle Talbot, a star during the early days of Hollywood. Plus, Aaron Neville on the release of his latest recording “My True Story.”