TSA Demonstrates New Imaging Technology At Reagan National Airport

ARLINGTON, VA - DECEMBER 30: A volunteer stands inside a "millimeter wave" scanner during a demonstration at the Transportation Security Administration's Systems Integration Facility at Ronald Reagan National Airport December 30, 2009 in Arlington, Virginia. "Millimeter wave" passes electromagnetic waves over the body to create three-dimensional images that look like a photo negative. The scan can detect hidden metallic and nonmetallic objects such as weapons and explosives without physical contact. (Photo by Chip Somodevilla/Getty Images)