An Alaska Air Guardsmen with the 144th Airlift Squadron inspects M9 chemical-agent detection paper after a mock chemical-attack exercise during Polar Force 19-4 on Joint Base Elmendorf-Richardson, April 3, 2019. Polar Force evaluates unit combat readiness while fighting in chemical, biological, radiological, nuclear and explosive protective gear. (U.S. Air National Guard photo by Senior Airman Louis Velasco)

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Photo by: SrA Louis Velasco |  VIRIN: 190403-Z-ZU973-1002.JPG