Cannabis Caravans Fuel Medical Pot Boom in Montana

'HELENA, Mont. — As Bob Marley music wailed in the next room, the makeshift clinic hummed along like an assembly line: Patients went in to see a doctor, paid $150 and walked out with permission to buy and smoke medical marijuana.

So it went, all day, at a hotel just blocks from the state Capitol that was the latest stop of the so-called cannabis caravan, a band of doctors and medical marijuana advocates roaming Montana to sign up thousands of patients.'