Airmen don their ground crew ensemble in the chemical, biological, radiological, and nuclear survival skills class at the readiness and emergency management flight on Laughlin Air Force Base, Texas, Jan. 14, 2015. All participants were expected to perform mission-oriented readiness and protective posture level procedures to ensure they are able to operate in a CBRN contaminated environment. (U.S. Air Force photo by Airman 1st Class Ariel D. Delgado)