Senior Airman Santos Rodriguez, 28th Communications Squadron client systems technician, checks the identification card of Senior Airman Bradley Barnes, 28th Bomb Wing ground safety technician, prior to allowing him entry to the 28th BW Headquarters building on Ellsworth Air Force Base, S.D., Dec. 14, 2011. Whenever a Force Protection Condition changes, regardless of whether it’s during an exercise or not, it is a real world change and all measures must be obeyed. (U.S. Air Force photo by Airman Alystria Maurer/Released)