Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds.

LOS ANGELES, CA - OCTOBER 19:  Dave Warden, a bud tender at Private Organic Therapy (P.O.T.), a non-profit co-operative medical marijuana dispensary, displays various types of marijuana available to patients on October 19, 2009 in Los Angeles, California. Attorney General Eric Holder announced new guidelines today for federal prosecutors in states where the use of marijuana for medicinal purposes is allowed under state law. Federal prosecutors will no longer trump the state with raids on the southern California dispensaries as they had been doing, but Los Angeles County District Attorney Steve Cooley recently began a crackdown campaign that will include raids against the facilities. Cooley maintains that virtually all marijuana dispensaries are in violation of the law because they profit from their product. The city of LA has been slow to come to agreement on how to regulate its 800 to 1,000 dispensaries. Californians voted to allow sick people with referrals from doctors to consume cannabis with the passage of state ballot Proposition 215 in 1996 and a total of 14 states now allow the medicinal use of marijuana. (Photo by David McNew/Getty Images)
LOS ANGELES, CA - OCTOBER 19:  Dave Warden, a bud tender at Private Organic Therapy (P.O.T.), a non-profit co-operative medical marijuana dispensary, displays various types of marijuana available to patients on October 19, 2009 in Los Angeles, California. Attorney General Eric Holder announced new guidelines today for federal prosecutors in states where the use of marijuana for medicinal purposes is allowed under state law. Federal prosecutors will no longer trump the state with raids on the southern California dispensaries as they had been doing, but Los Angeles County District Attorney Steve Cooley recently began a crackdown campaign that will include raids against the facilities. Cooley maintains that virtually all marijuana dispensaries are in violation of the law because they profit from their product. The city of LA has been slow to come to agreement on how to regulate its 800 to 1,000 dispensaries. Californians voted to allow sick people with referrals from doctors to consume cannabis with the passage of state ballot Proposition 215 in 1996 and a total of 14 states now allow the medicinal use of marijuana. (Photo by David McNew/Getty Images)

    JUST WATCHED

    Dr. Sanjay Gupta changes mind on weed

MUST WATCH

Dr. Sanjay Gupta changes mind on weed

CNN's Dr. Sanjay Gupta shares what he learned while working on a new documentary, 'Weed,' and why it changed his mind.

Dr. Sanjay Gupta changes mind on weed

CNN's Dr. Sanjay Gupta shares what he learned while working on a new documentary, 'Weed,' and why it changed his mind.