*** FILE *** Susan Hallowell, the director of the Transportation Security Administration's security laboratory, allows her body to be X-rayed by the "backscatter" machine at the Transportation Security Administration in Egg Harbor Township, N.J., Wednesday, June 25, 2003. Sky Harbor International Airport in Phoenix Arizona will test the new federal screening system that takes X-rays of passenger's bodies to detect concealed explosives and other weapons. The technology, called backscatter, has been aroundfor several years but has not been widely used in the U.S. as an anti-terrorism tool because of privacy concerns. (AP Photo/Brian Branch-Price)