In this May 13, 2009 file... Pictures

In this May 13, 2009 file photo, marijuana grown for medical purposes is shown inside a greenhouse at a farm in Potter Valley, Calif in Mendocino County. (AP Photo/Eric Risberg, File)
In this May 13, 2009 file photo, marijuana grown for medical purposes is shown inside a greenhouse at a farm in Potter Valley, Calif in Mendocino County. (AP Photo/Eric Risberg, File)

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