Fairchild Airmen perform first test of new chemical defense mask on KC-135
Senior Airman Stetson Vigil, 93rd Air Refueling Squadron boom operator, completes pre-flight tasks during the first in-field use and test of the new Joint Service Aircrew Mask on a KC-135 Stratotanker at Fairchild Air Force Base, Washington, July 17, 2018. The aircrew inspected crucial areas of improvement including comfort, weight, durability, heat stress, function and donning and doffing ease for every flight task. (U.S. Air Force photo/ Airman 1st Class Whitney Laine)

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Photo by: Airman 1st Class Whitney Laine |  VIRIN: 180717-F-PG301-098.JPG