** FILE ** A caregiver picks out a marijuana bud for a patient at a marijuana dispensary in Denver on Tuesday, Sept. 18, 2012. (AP Photo/Ed Andrieski)

Photo by: Ed Andrieski

** FILE ** A caregiver picks out a marijuana bud for a patient at a marijuana dispensary in Denver on Tuesday, Sept. 18, 2012. (AP Photo/Ed Andrieski)