CBRN survival training skills
Staff Sgt. Heidi Williams, 47th Civil Engineer Squadron emergency management technician, briefs trainees during the chemical, biological, radiological, and nuclear survival skills class at the confidence chamber on Laughlin Air Force Base, Texas, Jan. 14, 2015. Class attendees are educated on how to use a protective mask and how the chamber is used to help build their confidence about being in an environment with a potentially hazardous substance. The gas used in the chamber is chlorobenzylidene malonitrile, or CS Gas, a non-lethal substance that is used in all branches of the military and police departments as a riot control agent. (U.S. Air Force photo by Airman 1st Class Ariel D. Delgado)