Defending the perimeter
U.S. Air Force Capt. Jason Williams, 455th Expeditionary Security Forces Squadron, sector officer-in-charge, gives a mission brief to 455th ESFS Airmen during a humanitarian mission at Bagram Airfield, Afghanistan. During an attack on the airfield May 19, 2010, Captain Williams directed his Airmen to supplement perimeter defenses. Captain Williams is deployed from Keesler Air Force Base, Miss., and is a native of Asheboro, N.C. (U.S. Air Force photo by/ Staff Sgt. Richard Williams)