U.S. Air Force Airman 1st Class Israel Medina, 1st Operations Support Squadron, verifies the identity of an Airman driving onto Langley Air Force Base, Va., March 14, 2012. Prior to manning the gates, 633rd Security Forces trainers ensure augmentees can recognize various types of identification cards, enforce base entry requirements, direct traffic flow, and prevent security breaches. (U.S. Air Force photo by Airman 1st Class Kayla Newman/Released)