** FILE ** In this Oct. 23, 2013, Norton Arbelaez, right, the owner of River Rock marijuana dispensary, shows his products to foreign lawmakers, Julio Bango, of Uruguay, second from left, Larry Campbell, of Canada, third from left, and Fernando Belaunzaran, of Mexico, fifth from left, during a tour of his business in Denver. (AP Photo/Brennan Linsley, File)
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