FILE - This Feb. 13, 2013 shows different strains of marijuana are displayed during the grand opening of the Seattle location of the Northwest Cannabis Market, for sales of medical mari

 

              FILE - This Feb. 13, 2013 shows different strains of marijuana are displayed during the grand opening of the Seattle location of the Northwest Cannabis Market, for sales of medical mari
FILE - This Feb. 13, 2013 shows different strains of marijuana are displayed during the grand opening of the Seattle location of the Northwest Cannabis Market, for sales of medical marijuana products. It took 50 years for American attitudes about marijuana to zigzag from the paranoia of "Reefer Madness" to the excesses of Woodstock back to the hard line of Just Say No. And now, in just a few short years, public opinion has shifted so dramatically toward pragmatic acceptance of marijuana that even those who champion legalization are surprised at how quickly attitudes are changing and states are moving to approve the drug for medical use and just for fun. (AP Photo/Elaine Thompson, File)