Hose Adjustment Air Force Staff Sgt. Nathan Knight adjusts a liquid oxygen tank hose at Bagram Airfield, Afghanistan, Sept. 14, 2016. Knight is a cryogenics supervisor assigned to the 455th Expeditionary Logistics Readiness Squadron. Air Force photo by Senior Airman Justyn M. Freeman SHARE IMAGE: Download Image: Full Size (1.9 MB) Tags: AIR FORCE, Afghanistan , Airmen Photo By: Senior Airman Justyn Freeman VIRIN: 160914-F-RN544-165A.JPG Photo Gallery