Airmen from the 633rd Civil Engineering Squadron extracts Captain Jamie Mun, 94th Fighter Squadron pilot, after responding to a simulated-alert at Langley Air Force Base, Va., Dec. 12, 2012. This alert was part of the phase I combined unit exercise to prepare Airmen for the possibility of a real alert. (U.S. Air Force photo by Airman Kimberly Nagle/Released)