Marijuana in Maastricht Ermindo Armino/AP hide caption

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Ermindo Armino/AP

The Marijuana Trade In The Euro's Birthplace

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Brian Lawson rolls a marijuana cigarette at the BC Marijuana Party Headquarters in Vancouver, British Columbia. Vancouver is in the marijuana-friendly corner of Canada. Jae C. Hong/AP hide caption

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Jae C. Hong/AP

Despite the "not for consumption warning," the DEA has banned the sale of products like K2, which contain herbs and spices sprayed with a synthetic compound chemically similar to THC, the psychoactive ingredient in marijuana. Kelley McCall/AP hide caption

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Kelley McCall/AP