Evan Roth, is working on a project that will be released soon - the pictures say it all, it's a "carry on" communication system. These metal places contain messages which will appear when they are X-Rayed. The project isn't quite done yet, Evan needs access to an X-Ray machine to take some photos and document. If you have access to an X-Ray machine he's willing to give you a set of the plates for helping out (email fi5e [at] ni9e.com].
What I did was trace a Beretta 9mm in tripled up heavy duty aluminum foil and tape it inside the pages of a Motor Trend magazine (with Tim Allen on the cover - irresistible) and taped those pages closed so when flipping through it the 'gun' wouldn't be easily found. I took it with me to a traffic court date and left it outside in the smoking area and waited for some tweaker find it. I walked in ahead of him and watched as the cops passed it through the x-ray machine with piles of other stuff and flipped the fuck out. They stopped the line and searched through all the stuff in the machine looking for the 'gun'. Of course it wasn't easy and upon seeing how truly agitated they were I headed to my hearing and left the commotion behind.
Of course this was pre 9/11 and I'd never do something like that today.