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U.S. Air Force Staff Sgt. Stephen Lail, 19th Operations Support Squadron loadmaster, undergoes a gas mask fit test of the M69 Joint Service Aircrew Mask Strategic Aircraft during operational testing of the new system at Little Rock Air Force Base, Arkansas, April 26, 2019. Lail performed his typical duties on a C-130J testing the compatibility and effectives of the system for the airframe. (U.S. Air Force photo by Senior Airman Rhett Isbell)
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