HVAC maintenance
MANAS AIR BASE, Kyrgyzstan (AFPN) -- Staff Sgt. Michael Dower fills a heating unit with diesel fuel before delivering it to the security forces squadron, which will use it to heat outdoor security checkpoints. Sergeant Dower is deployed to the 376th Air Expeditionary Wing Civil Engineer Squadron. (U.S. Air Force photo by Staff Sgt. Lara Gale)