Michael Pollan, author of "The Omnivore’s Dilemma" and "The Botany of Desire," focuses on psychedelic drugs in his most recent book. "How to Change Your Mind" dives into the latest developments in trials using psychedelic therapy to treat depression, anxiety, obsession, and trauma. For the book, Pollan immersed himself in the psychedelic experience, saying it helped him become more open, emotionally available, patient, and less defensive. He talks with Corby Kummer, senior editor at The Atlantic, about how this kind of therapy is impacting the mind, the self, and the spiritual experience.