Liquid Oxygen U.S. Air Force Senior Airman Keith Henry prepares liquid oxygen to service a C-130 Hercules aircraft on Bagram Airfield, Afghanistan, Nov. 11, 2015. Henry is a crew chief assigned to the 455th Expeditionary Aircraft Maintenance Squadron. U.S. Air Force photo by Tech. Sgt. Robert Cloys SHARE: Download: Full Size (1.51 MB) Tags: Photo Essays, U.S. Airmen, Bagram Airfield, Robert Cloys, c-130 hercules, afghanistan, Maintenance, All images Credit: Tech. Sgt. Robert Cloys VIRIN: 151111-F-CX842-011.JPG Photo Gallery