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Marijuana

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Downside of legal pot

This week, the DEA chose to keep pot on its list of most dangerous drugs, even though more and more states and cities are legalizing or decriminalizing pot use. But few Americans recognize a significant downside to the pot-legalization movement, which is addressed in an article in this month's Esquire magazine. Don Winslow, author of "Horse of the Apocalypse," joins "CBS This Morning: Saturday" to explain how the legalization of pot drove Mexican drug cartels to the heroin market.

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A recent AAA study found an increase in deadly crashes involving drivers who had smoked pot, but another study by the same researchers warns that there is currently no reliable test to determine whether drivers have been impaired by the drug

A recent AAA study found an increase in deadly crashes involving drivers who had smoked pot, but another study by the same researchers warns that there is currently no reliable test to determine whether drivers have been impaired by the drug. Kris Van Cleave reports.

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