DEMORCRACY NOW - As we continue our conversation on the nationwide shift towards liberalizing drug laws, we are joined by the groundbreaking neuro-psycho-pharmacologist Dr. Carl Hart. He is the first tenured African-American professor in the sciences at Columbia University where he is an associate professor in the psychology and psychiatry departments. He is also a member of the National Advisory Council on Drug Abuse and a Research Scientist in the Division of Substance Abuse at the New York State Psychiatric Institute.