JOINT BASE ELMENDORF-RICHARDSON, Alaska -- Alaska Air National Guard Senior Airman James Donadio, a 176th Civil Engineer Squadron structural specialist, repairs 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)