CHICAGO - DECEMBER 23:  A U.S. Transportation Security Administration (TSA) employee (L) passes a metal-detecting wand over a female traveler's chest at O'Hare International Airport December 23, 2004 in Chicago, Illinois. The TSA has issued new guidelines regarding pat-downs and other screening techniques stating the security enhancements must be carried out appropriately.  (Photo by Tim Boyle/Getty Images)