Testing Systems1
Senior Airman David Parr (front) and Senior Airman Christopher Thomas inspect a heating and cooling control panel Oct. 14, 2010 at Yokota Air Base. The testing marks the beginning of the No Heat, No Cool season there. Airman Parr and Airman Thomas are both heating, ventilation and air conditioning technicians with the 374th Civil Engineer Squadron (U.S. Air Force photo/Osakabe Yasuo)