>> he has his name on three plants. >> as they are about to learn, starting a revolution can be tough, even if they can get the medical marijuana. they still need to get dea approvals and a final study location because las vegas also said no. their journey is about to have some serious ups and downs, but all eyes are on an equally revolutionary study. could marijuana, the drug associated with short-term memory loss, save the minds of millions suffering with alzheimer's?