Civilians from the 437th Aerial Port Squadron position a Negatively Pressurized Conex prototype after its delivery to Joint Base Charleston, S.C., April 21, 2020. The NPC was rapidly developed and designed to fit inside both C-5 and C-17 aircraft to enable safe transport of up to 28 patients, as well as teams of medical professionals to medical facilities around the globe. (U.S. Air Force photo by Staff Sgt. Chris Drzazgowski)