JOINT BASE ELMENDORF-RICHARDSON, Alaska -- From left to right, Alaska Air National Guard Senior Airman James Donadio, Airman 1st Class James Fielder and Airman 1st Class Matthew Goodwin, all 176th Civil Engineer Squadron structural specialists, repair a shed Oct. 24, 2021, during task qualification training under simulated chemical, biological, radiological, and nuclear conditions at Joint Base Elmendorf-Richardson. Headquarters Air Force requires the squadron to complete 224 tasks under CBRN conditions across the squadron's career fields. (U.S. Air National Guard photo by David Bedard/Released)