U.S. Airmen assigned to the 100th Logistics Readiness Squadron receive a briefing during an Ability to Survive and Operate exercise at Royal Air Force Mildenhall, England, Dec. 3, 2021. The ATSO exercise provided a refresher course on self-aid buddy care, post attack reconnaissance, and chemical, biological, radiological, and nuclear environment operations. (U.S. Air Force Airman 1st Class Viviam Chiu).