Let's Roll

[Denver, April 20. Image via Getty]

DENVER – APRIL 20: A woman smokes a joint at a pro-marijuana ‘4/20’ celebration in front of the state capitol building April 20, 2010 in Denver, 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 has become more mainstream. (Photo by John Moore/Getty Images)