They didn’t make a big announcement about it, but TSA is changing how it views marijuana in a subtle but important way. Last month, the TSA website was updated to say that medical marijuana would be allowed in carry-on and checked bags. TSA then reiterated that they aren’t necessarily looking for illegal substances, just anything that could be dangerous in the air. If they come across an illegal substance, then they deal with it. But the search isn’t focused on it.