Master Sgt. Leonardo Erazo, 5th Health Care Operations Squadron medical logistics flight chief, reads a checklist to Staff Sgt. Beau Wilson, 5th HCOS biomedical equipment technician and Tech. Sgt. Christopher Thornton, 87th Operational Medical Readiness Squadron occupational health noncommissioned officer in charge, inside a Negatively Pressurized Conex on Dover Air Force Base, Delaware, April 7, 2021. All three are members of the 775th Expeditionary Aeromedical Evacuation Flight that conducted NPC training on board a C-17 Globemaster III. (U.S. Air Force photo by Roland Balik)