HVAC Airmen keep cool and work on
U.S. Air Force Senior Airman Darek Vetter and Louis Lorick, 20th Civil Engineer Squadron heating, ventilation, and air conditioning technicians, remove a heating and air conditioning evaporator to find a leak at the 20th Equipment Maintenance Squadron at Shaw Air Force Base, S.C., March 28, 2016. The technicians used a variety of tools including regulators, nitrogen, and soap bubbles to determine exactly where the leak was located, which was releasing refrigerant. (U.S. Air Force photo by Airman 1st Class Destinee Dougherty)