For over a decade, Dr. Thomas Insel headed the National Institute of Mental Health and directed billions of dollars into research on neuroscience and the genetic underpinnings of mental illnesses. Health correspondent Rhitu Chatterjee talks with Dr. Thomas Insel about his new book, Healing: Our Path from Mental Illness to Mental Health and how he came to realize where the U.S's mental health care system had failed, despite scientific advances in the field.