Tech. Sgt. Rob Runnion, an aircrew flight equipment technician assigned to the 910th Operations Support Squadron, gives instructions for the next step in the processing line to Senior Airman Kaleb Walker, a loadmaster assigned to the 757th Airlift Squadron on May 4, 2019. Walker and other aircrew members here took part in an aircrew chemical, biological, radiological, nuclear defense training to practice operating in a chemical threat area. (U.S. Air Force photo/Senior Airman Juliet Louden)