JOINT BASE BALAD, Iraq -- Staff Sgt. Samnang Lay, 332nd Expeditionary Civil Engineer Squadron electrician, replaces a bulb on an approach light here, July 5. Illumination of the airfield at night is critical to the safety of aircraft, personnel and cargo at the busiest single runway operation in the Department of Defense. Sergeant Lay is deployed from Ellsworth Air Force Base, S.D. (U.S. Air Force photo/ Senior Airman Julianne Showalter)