Medical maintenance
KUNSAN AIR BASE, Republic of Korea -- Staff Sgt. Joey Aroc, 8th Medical Support Squadron, bio-medical equipment technician, assembles a Drager Anesthesia Machine Sept. 9. Bio-medical maintenance technicians spend eleven months at Sheppard Air Force Base, Texas, learning to repair, calibrate and maintain medical equipment. They also store and maintain war reserve materials for expeditionary medical support, which are commonly known as field hospitals. (U.S. Air Force photo/ Senior Airman Roy Lynch)