FYI--some airports (I'm not sure about LAX but San Diego has one) have implemented a new detector--before you walk through the standard metal detector, they have you walk into this booth-it blows air all over you. I asked the TSA agent what it was for--he told me that if you have anything on you that you are not supposed to - i.e. drugs, gunpowder, crap they use to make bombs with, etc.--the air blows this residue onto the floor-which doubles as a type of residue-detector. If the residue-detector detects anything, you're arrested. Just a heads up.