Tabitha M. Powledge replies to criticism of her Aug. 23 column taking journalists to task for not writing more on the changing views of CNN's Sanjay Gupta on marijuana legalization. She also reviews coverage of the newest news — the Justice Department's move to back off enforcement in Colorado and Washington — and warns of a paucity of marijuana research: "This is a huge experiment we’re running here, folks. And so far as I know, no one’s keeping track of it."
