 Today on the New Yorker Radio Hour, the legendary biographer Robert Caro. Caro told me an amazing story from his multi-volume biography of Lyndon Johnson. He once brought Johnson's younger brother to the Johnson family home in Texas. Caro interviewed him right in the dining room. I said, sit down in the place you sat as a boy. Robert Caro sits behind him out of his line of sight, kind of like a psychoanalyst with a patient.