A long line of buyers trails from a store selling marijuana in Pueblo West, Colo, Wednesday, Jan. 1, 2014. The nation's first recreational pot industry opened in Colorado on Wednesday, kicking off a marijuana experiment that will be watched closely around the world. (AP Photo/John Wark)

Associated Press
A long line of buyers trails from a store selling marijuana in Pueblo West, Colo, Wednesday, Jan. 1, 2014. The nation's first recreational pot industry opened in Colorado on Wednesday, kicking off a marijuana experiment that will be watched closely around the world. (AP Photo/John Wark)
A long line of buyers trails from a store selling marijuana in Pueblo West, Colo, Wednesday, Jan. 1, 2014. The nation's first recreational pot industry opened in Colorado on Wednesday, kicking off a marijuana experiment that will be watched closely around the world. (AP Photo/John Wark)
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