Tech. Sgt. Bryan Lonowski trains Airman Basic Thomas O’Connor and Airman 1st Class Trenton Wyant on how to transfer liquid oxygen to an oxygen reservoir in a B-52 Stratofortress during the crew chief course, Aug. 14, 2013, at Sheppard Air Force Base, Texas. Students learn the required maintenance requirements step by step in the training manual. Lonowski is assigned to the 362nd Training Squadron. Danny Webb

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Keywords: .., air, defense, force, liquid, military, oxygen, transfer, united, war