On The Glenn Show, Mark talks about his work helping the state of Washington to legalize marijuana. Mark explains why marijuana sales clerks might need pharmacological training. Glenn is skeptical that the state needs to control the amount of the drug sold by a firm, but Mark is more worried that a few companies will grow like weeds to become Big Pot, and hopes that smart regulation can nip it in the bud. Mark says the state might still have to do drug busts. Finally, they consider how much money Washington will be able to raise by taxing marijuana.