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Weed 3: The Marijuana Revolution

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It's time for a medical marijuana revolution
By Dr. Sanjay Gupta, Chief Medical Correspondent
Gupta: 'I am doubling down' on medical marijuana

Medical Marijuana

Rare tour of the only federal weed farm in America

Various bottles of alcohol are seen at a bar in Vienna on April 12, 2013. AFP PHOTO / ALEXANDER KLEIN (Photo credit should read ALEXANDER KLEIN/AFP/Getty Images)

Is marijuana as safe as -- or safer than -- alcohol?

BERKELEY, CA - MARCH 25: One-ounce bags of medicinal marijuana are displayed at the Berkeley Patients Group March 25, 2010 in Berkeley, California. California Secretary of State Debra Bowen certified a ballot initiative late Wednesday to legalize the possession and sale of marijuana in the State of California after proponents of the measure submitted over 690,000 signatures. The measure will appear on the November 2 general election ballot. (Photo by Justin Sullivan/Getty Images)

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