31 CES Operations Flight
Senior Airman Matthew Sanders and Tech Sgt. Brandyn Walter observe as a heating unit is hoisted off a roof, Oct. 20, 2014, at Aviano Air Base, Italy. The 31 Civil Engineer Squadron Operations Flight are responsible for the water and fuel systems, structures, electrical units, heavy equipment, and heating and cooling systems on base. Sanders is a 31st CES heating, ventilation, air conditioning and refrigeration technician, and Walter is a 31st CES structures craftsman. (U.S. Air Force photo/Airman 1st Class Deana Heitzman)