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U.S. Air Force Airman Joann Alicea, 86th Operations Support Squadron aircrew flight equipment technician, left, and Airman 1st Class Francisco Castillo, 86 OSS aircrew flight equipment technician, perform a full maintenance on oxygen masks at Ramstein Air Base, Germany, Jan. 20, 2022. Aircrew flight equipment Airmen perform full maintenance on oxygen masks, including assembly, disassembly and cleaning, to ensure they are in proper working order. (U.S. Air Force photo by Airman 1st Class Jared Lovett)
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