He defends certain techniques, including waterboarding, that some consider torture.Morley Safer talks to Dr. Nora Volkow, head of the National Institute on Drug Abuse, on the use of MRI brain scans of addicts to demonstrate the difficulty to just no to drugs and other addictions, including eating, smoking and gambling.morelessEpisode OverviewReviewsWatch Full EpisodegoTV.comFreeXfinityFreeNovember