316 CES HVAC technicians keep air flowing at Andrews
Airman 1st Class Zane Miller, 316th Civil Engineer Squadron heating, ventilation and air conditioning technician, checks the status of a boiler on Joint Base Andrews, Md., Jan. 27, 2010. Though HVAC by name covers three key components facility maintenance, the mission of the flight encompasses a wide range of responsibilities. (U.S. Air Force photo by Chelsea Gitzen)