People roll joints at a marijuana party near the University of California at Berkeley campus in 1966. December 6 marks the first day Washington’s new law legalizing marijuana takes effect.
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A 1930s anti-marijuana movie poster is displayed as part of an exhibit at the DEA Museum and Visitors Center which opened 1999 in Arlington, Va.
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Louis Armstrong performs in New York on March 12, 1941. Armstrong, a lifelong fan and defender of the drug he called "gange," was arrested in California in 1930 and given a six-month suspended sentence for pot possession.
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Actor Robert Mitchum and actress Lila Leeds are sentenced to 60 days in jail on charges of conspiracy to possess marijuana cigarettes in Los Angeles on Feb. 9, 1949.
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Soldiers in Saigon smoke marijuana using the barrel of a shotgun they nicknamed "Ralph" to get high in 1970.
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This file image made from a film produced by the U.S. Department of Agriculture during World War II, shows the title frame of the movie "Hemp for Victory." After Japanese troops cut off access to Asian fiber supplies during the war, it released the film urging farmers to grow hemp and extolling its use in parachutes and rope for the war effort.
U.S. Department of Agriculture/AP
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Police handcuff a suspect during a drug raid in Miami on May 18, 1979.
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Youths sell marijuana openly from sacks at a banned music festival in Middlefield, Conn., on Aug. 1, 1970, beneath a sign advertising their products as "Mexican Coletus at $10 an ounce."
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A 1996 television ad aired by Republican presidential candidate Bob Dole's campaign included footage from a 1992 MTV interview of President Clinton saying he would inhale marijuana if given the chance to relive his college days.
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Murphy Brown, portrayed by actress Candice Bergen, smokes a marijuana cigarette to quell nausea induced by the chemotherapy used to treat her breast cancer in 1997.
CBS, Spike Nannarello/AP Photo
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A marijuana smoker listens to a speaker during the "Smoke In" at Washington, D.C.'s Lafayette Park on July 4, 2000. Participants marched from the park to the Lincoln Memorial to support the legalization of marijuana.
Shawn Thew/AFP/Getty Images
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People attending an Amendment 64 watch party celebrate after a local television station announced the marijuana amendment's passage in Denver, Colo.
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A man smokes marijuana just after midnight on "Legalization Day" on Dec. 6, 2012, at the Space Needle in Seattle.
Ted S. Warren/AP
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Andre Edwards smokes marijuana just after midnight at the Space Needle in Seattle on Dec. 6, 2012.
Ted S. Warren/AP
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