CNN — Prior to filming our first documentary on cannabis a decade ago, I was highly skeptical about its use as a medicine. I had even written a story for Time magazine a few years earlier to make the case that the evidence simply wasn’t there. But, as so often happens when we start to dig into things, a different picture started to emerge. I traveled the world, visited tiny … [Read more...] about Dr. Sanjay Gupta: Cannabis is having a senior moment