Very interesting, and I agree with Douglas, TSA sucks. I barely ever fly, but last year I had to take an international fly so I went to their website to check the list of allowed and forbidden items. If you buy a bottle of water at the overpriced stores at the airport outside of the security area, they take your water away. But, according to that list, you can take in your carry on bag a cork screw, and one of those little screwdriver sets to fix reading glasses, both of which I'm sure can be used to kill or at least seriously injure a person.