U.S. Air Force Senior Airman Dylan Sheets, 577th Expeditionary Prime Base Engineer Emergency Force Squadron heating, ventilation, and air conditioning specialist, and Senior Airman Mervin Santa Maria, 577th EPBS electrician, rake concrete at Kandahar Airfield, Afghanistan, Jan. 4, 2014. The 577th EPBS poured concrete for a large-area maintenance facility, which is about 8,000 square feet. (U.S. Air Force photo by Senior Airman Kayla Newman/Released)