This is a site explaining how you can make weapons with items you can buy after security screenings. All of them have been reported to the TSA. The thing that most dismays me about this site is that a friend asked me not to look at it on his computer in case the TSA refused him entry to the USA the next time he went there because of it.
It only takes a few minutes to find ways to create these weapons or cause chaos before the security screening – almost as if there are hardly any terrorists trying to perform attacks on us.
Link: Terminal Cornucopia