JOINT BASE BALAD, Iraq -- Staff Sgt. Samnang Lay, 332nd Expeditionary Civil Engineer Squadron electrician, replaces a bulb on a runway edge light here, July 5. The airfield lights safely guide aircraft during taxi, take off and landing during inclement weather and nighttime operations. Sergeant Lay is deployed from Ellsworth Air Force Base, S.D. (U.S. Air Force photo/ Senior Airman Julianne Showalter)