Staff Sgt. Matthew Sato
U.S. Air Force Staff Sgt. Matthew Sato, 51st Civil Engineer Squadron heating, ventilation and air-conditioning technician, works with HVAC gauges at Osan Air Base, Republic of Korea on August 9, 2017. The Osan HVAC shop has 18 active duty military members and 20 civilian contractors that are responsible for almost 600 base facilities.
(U.S. Air Force photo by Airman 1st Class Gwendalyn Smith)