Marijuana saleswoman Marissa Dodd bags up a sale for a customer at Dr Reefer's marijuana dispensary April 20 2010 at the University of Colorado in...
{"Image ImageDescription": "BOULDER, CO - APRIL 20: Marijuana saleswoman Marissa Dodd (L) bags up a sale for a customer at Dr. Reefer's marijuana dispensary April 20, 2010 at the University of Colorado in Boulder, Colorado.   April 20th has become a de facto holiday for marijuana advocates, with large gatherings and \"smoke outs\" in many parts of the United States.  Colorado, one of 14 states to allow use of medical marijuana, has experienced an explosion in marijuana dispensaries, trade shows and related businesses in the last year as marijuana use becomes more mainstream here.  (Photo by Chris Hondros/Getty Images)", "Image Copyright": "2010 Getty Images"}