Matthew Abel (L) learns about machinery made by Apeks Supercritical that creates cannabis oil, while Ryan McDonald (C) explains the products to other participants during the 2nd National Marijuana ... more 
Matthew Abel (L) learns about machinery made by Apeks Supercritical that creates cannabis oil, while Ryan McDonald (C) explains the products to other participants during the 2nd National Marijuana Business Conference and Expo in Auburn, Washington November 8, 2013. REUTERS/David Ryder (UNITED STATES - Tags: SOCIETY POLITICS DRUGS BUSINESS) less 
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Reuters | Photo By DAVID RYDER / REUTERS
Fri, Nov 8, 2013 9:06 PM EST