Airman 1st Class Maxwell Dean, a material management apprentice with the 1st Special Operations Logistics Readiness Squadron, oversees a gas mask seal test at Hurlburt Field, Fla., July 7, 2016. A Joint Service Mask Leakage tester monitors aerosol vapor under a gas mask shroud to check masks for leaks and blocks. ( Air Force photo by Senior Airman Andrea Posey)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
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Keywords: 1, 1st, airman, gas, history, mask, people, posey, solrs, sow