U.S. Airmen converse inside a Negatively Pressurized Conex prototype during in-flight testing on a C-17 Globemaster III, April 30, 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 passengers, as well as teams of medical professionals to medical facilities around the globe. (U.S. Air Force photo by Staff Sgt. Chris Drzazgowski)