Feel Free to Get All Kinds of High and Drive Because the Cops Can’t Really Tell

Or they can't tell yet, at least not until some government research lab perfects a saliva test that will detect recent marijuana use. For now, police departments in states that permit medical marijuana use are struggling to determine the levels at which the drug impairs one's ability to competently operate an… »3/18/12 4:20pm3/18/12 4:20pm