JOINT BASE LEWIS-MCCHORD, Wash. -- U.S. Air Force Airmen participate in a gas chamber training at Joint Base Lewis-McChord, Washington, Aug. 26, 2022. The 627th CES partnered with the 349th Chemical Company for a chemical, biological, radiological, and nuclear exercise to ensure Airmen are proficient in using a gas mask to prepare them for a biological or chemical attack. (U.S. Air Force photo by Senior Airman Callie Norton)