Tech. Sgt. Virgilio Biascan, 36th Medical Support Squadron NCO in charge of biomedical equipment maintenance, tests an internal battery of an infusion pump Aug. 25, 2015, at Andersen Air Force Base, Guam. Biomedical equipment technicians are responsible for maintenance of all medical equipment used on base. (U.S. Air Force photo by Staff Sgt. Alexander W. Riedel/Released)