X-ray vision
U.S. Air Force Airman 1st Class Tyler Shaw operates the Z Portal system at Joint Base Charleston, S.C., March 23, 2010. The Z portal's capabilities are used to scan vehicles to identify drugs, bombs and human trafficking. Approximately 120 vehicles are scanned each day, which is just one measure to ensure security on the base. Airman Shaw is a security member for the 628th Security Forces Squadron. (U.S. Air Force photo/James Bowman/released)