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BERKELEY, CA - MARCH 25:  (FILE PHOTO) The Seattle Hempfest takes place on August 19-21, 2011 in Seattle, Washington. The annual gathering founded in 1991 is the world's largest advocating the legalization of marijuana.To Look Back At Cannabis, Please refer to the following profile on Getty Images Archival for further imagery. http://www.gettyimages.co.uk/Search/Search.aspx?EventId=120117679&EditorialProduct=Archival A one-ounce bag of medicinal marijuana is displayed at the Berkeley Patients Group March 25, 2010 in Berkeley, California.  California Secretary of State Debra Bowen certified a ballot initiative late yesterday 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)
BERKELEY, CA - MARCH 25:  (FILE PHOTO) The Seattle Hempfest takes place on August 19-21, 2011 in Seattle, Washington. The annual gathering founded in 1991 is the world's largest advocating the legalization of marijuana.To Look Back At Cannabis, Please refer to the following profile on Getty Images Archival for further imagery. http://www.gettyimages.co.uk/Search/Search.aspx?EventId=120117679&EditorialProduct=Archival A one-ounce bag of medicinal marijuana is displayed at the Berkeley Patients Group March 25, 2010 in Berkeley, California.  California Secretary of State Debra Bowen certified a ballot initiative late yesterday 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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