Staff Sgt. Ben Levalley, 11th Civil Engineer Squadron heating, ventilation, air conditioning, and refrigeration journeyman, repairs an air conditioning unit at the Child Development Center Three on Joint Base Andrews, Md., July 13, 2016. The HVAC flight cares for approximately 6,000 air conditioning units throughout JBA. (U.S. Air Force photo by Senior Airman Mariah Haddenham)