Awhile back, I remember being shocked after reading an article about a woman who was forced to remove her necklace she was wearing because it was a "security risk."  That necklace was a tiny pistol pendant, something that the woman probably did not think would cause such commotion.  I personally think that kind of necklace is completely trendy and one-of-a-kind.  If you've got travel plans soon, any involving flying, think twice about the jewelry you wear. 

Check out the article here : http://blogs.usatoday.com/sky/2008/06/pistol-pendant.html