Spc. Noah Yanez, a combat medical specialist assigned to the 47th Brigade Support Battalion, 2nd Armored Brigade Combat Team, 1st Armored Division, exits a gas chamber during chemical, biological, radiological, and nuclear training on Camp Buehring, Kuwait, August 3, 2023. The gas chamber is a room that has a controlled concentration of CS (orto-chlorobenzylidene-malononitrile) gas, more commonly known as tear gas. Soldiers conduct mask confidence training by demonstrating the effectiveness of personal protective equipment in protecting against chemical, biological, radiation, and nuclear hazards. (U.S. Army Reserve photo by Sgt. David Campos-Contreras)