5th CES: Feel the CBRN Published Feb. 5, 2018 By Airman 1st Class Dillon J. Audit 5th Bomb Wing Public Affairs MINOT AIR FORCE BASE, N.D. -- The 5th Civil Engineer Squadron emergency management section conducts a chemical, biological, radiological and nuclear defense class four times a week at Minot Air Force Base, Jan. 30, 2018. CBRN is used to help Airmen learn how to protect themselves against chemical warfare. Every Airman is required to take this class every 18 months and before deployment to any high threat areas. (U.S. Air Force photos by Airman 1st Class Dillon J. Audit)