U.S. Air Force Master Sgt. Hector Ybanez, the 509th

U.S. Air Force Master Sgt. Hector Ybanez, the 509th Munitions Squadron armament maintenance section chief, inspects his gas mask during a Chemical, Biological, Radiological and Nuclear Defense Survival Skills class March 5, 2018, at Whiteman Air Force Base, Mo. During the class Airmen are trained on how to properly inspect and wear the mission-oriented protective gear that can help save their life in the event of a CBRN attack. (U.S. Air Force photo by Airman 1st Class Taylor Phifer)