I've heard of development on drug detection "vaccumes" / machines, so it's probably possible. Kind of a scary idea tbh. Edit: Apparently they are already in us

I've heard of development on drug detection "vaccumes" / machines, so it's probably possible. Kind of a scary idea tbh. Edit: Apparently they are already in use at prisons. http://articles.baltimoresun.com/1997-10-02/news/1997275114_1_drug-detection-drug-interdiction-drug-dealer http://articles.baltimoresun.com/1997-10-02/news/1997275114_...