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by CBSTV Videos 0:50 mins

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by CBSTV Videos 0:50 mins

Dr. Nora Volkow, head of the National Institute on drug abuse, uses the brain scans of addicts to show how difficult it is to just say no to drugs and other addictive behaviors, including eating. Morley Safer reports on Sunday, April 29 at 7 p.m. ET/PT.

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