One of three marijuana plants growing in the backyard of a 65-year-old retiree from Pompano Beach, Fla. He grows and smokes his own "happy grass" to alleviate pain.
A man pulls out a bag of marijuana to fill a pipe at Hempfest in Seattle on Aug. 16. Thousands packed a waterfront park for the opening of a three-day marijuana festival, an event that is part party, part protest and part victory celebration after the legalization of pot in Washington and Colorado in 2012.
Sen. Patrick Leahy is calling on the Justice Department to state its position on marijuana's legal status. Here, a man inspects a shirt depicting the U.S. flag made of marijuana symbols, at a medical marijuana show in Los Angeles earlier this year.
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Even if students have a prescription for pot, marijuana remains illegal under federal law. Colleges that let students self-medicate on campus could jeopardize their federal funding.