Tech. Sgt. Stacy Klein, 14th Operational Medical Readiness Squadron’s Aerospace and Operational Physiology Flight section chief, explains the details of an exercise to participants Sept. 3, 2019, on Columbus Air Force Base, Miss. The exercise began as a chamber simulation inside the Hyperbaric Chamber Room with AOP Airmen using procedures utilized in training and a handful of participants tasked with chamber reactions. (U.S. Air Force photo by Airman 1st Class Hannah Bean)