Master Sgt. Colton Guilliams, the 189th Medical Group noncommissioned officer in charge of public health, troubleshoots one of the three ventilators brought in from the neonatal intensive care unit at a hospital in Retalhuleu, Guatemala. Guilliams is a drill status Air National Guard member who works as a biomedical technician in his civilian capacity. (U.S. Air Force photo by Tech. Sgt. Jessica Condit)