Tommy Chong has prostate cancer, and he's using a very familiar weapon to fight it. "I'm treating it with hemp oil, with cannabis," he tells CNN. "So (legalizing marijuana) means a lot more to me than just being able to smoke a joint without being arrested." The comedian and other half of Cheech and Chong says he has "a slow stage one" that developed during three years in which he was drug-free. "So I know it had nothing to do with cannabis," he says. "Cannabis is a cure." But, for the record, Chong says he doesn't smoke pot anymore; rather, he takes hemp oil "at night, so I won't be woozy all day. I'm taking it as a medicine."