U.S. Air Force Airman Georgia Knight, 18th Aerospace Medicine Squadron bioenvironmental engineering technician, assists an Airman into a level-A suit during a fuel spill exercise at Kadena Air Base, Japan, Oct. 25, 2019. The level-A suit is the highest level protection against vapors, gases, mists and particles, which consists of a fully encapsulating chemical entry suit with a self-contained breathing apparatus. It’s protects Airmen from hazardous material and harmful environments. (U.S. Air Force photo by Naoto Anazawa)