Colombia Is Turning Into A Major Medical Marijuana Producer

Rather than a symbol of the country's dark past of narco-fueled violence, Santiago smiles and says, Colombian drugs "can now be used to treat people."

At least that's the bet of a growing number of entrepreneurs who are building vast marijuana plantations and state-of-the-art pharmaceutical laboratories that produce everything from cannabis-based pain relievers for cancer patients to dog treats that act as calming agents.