Dr. Sanjay Gupta is making headlines with his new documentary "Weed." In the year he spent working on it, he changed his opinion of the drug and its medical uses. Tonight he talks about the patients it helped and marijuana's potential to help others.
Anderson Cooper goes beyond the headlines to tell stories from many points of view, so you can make up your own mind about the news. Tune in weeknights at 8 and 10 ET on CNN.
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