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Tech. Sgt. Alexander Johnston, 100th Operations Support Squadron aircrew flight equipment lead trainer, cleans a helmet visor at RAF Mildenhall, England, Dec. 3, 2019. The AFE shop maintains and inspects equipment such as flight helmets, oxygen masks, survival gear and radios that help pilots and other aircrew complete the mission. (U.S. Air Force photo by Airman 1st Class Joseph Barron)
60.0 mm f/2.8
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