A U.S. Air Force Special Operations Group Airman works in protective equipment during an Ability to Survive and Operate (ATSO) exercise Nov. 3, 2017, at Kadena Air Base, Japan. The integrated ATSO and chemical, biological, radiological and nuclear (CBRN) training tested Airmen on accountability procedures, pre and post-attack defensive measures and employment of protective equipment. (U.S. Air Force photo by Capt. Jessica Tait)