Dr. Norman Rosenthal, MD is an expert in Transcendental Mediation and has written a new book on the subject called Super Mind: How to Boost Performance and Live a Richer and Happier Life Through Transcendental Meditation. In 1980s, he was a pioneer in the use of light therapy to treat Seasonal Affective Disorder or Winter Depression. He speaks with Michael Martin on the many benefits that TM provides its practitioners regardless of whether they trade or manage risk.