Airman 1st Class Justin Jett, fuels distribution operator, 436th Logistics Readiness Squadron, fills transfer carts with liquid oxygen, Nov. 4, 2019, at Dover Air Force Base, Del. The liquid oxygen will be loaded onto aircraft, where it is converted back to a breathable gaseous form for the aircrews. (U.S. Air Force photo by Mauricio Campino)

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Photo by: Mauricio Campino |  VIRIN: 191104-F-DA916-1217.JPG