U.S. Air Force Capt. Diandra Harrison, 10th Expeditionary Aeromedical Evacuation Flight, flight nurse, connects a therapeutic oxygen hose from a Negatively Pressurized Conex into an oxygen supply from a C-17 Globemaster III aircraft during training at Ramstein Air Base, Germany, Jan. 30, 2021. The NPC is designed to integrate into the aircraft’s oxygen and power supply systems. The NPC used in the training is permanently assigned to the 521st Air Mobility Operations Wing here and offers infectious disease transport capabilities to Europe and Africa. (U.S. Air Force photo by Airman 1st Class Daniel Sanchez)