reporting, also the fact that it can help heal the brain. you can't tell people to just say "no," if they're no longer capable of doing that. you can't do it. yet you have this substance out there that could help their brain heel in a way that they no longer have those same cravings, those same tendencies. >> fascinating. can't wait to see it. don't miss dr. sanjay gupta's "weed," sunday, april 29th. that's it for us tonight, thanks for watching. i'll see you right back here tomorrow. . . .