U.S. Air Force Airman 1st Class Trevion Francis, 7th Civil Engineer Squadron emergency management journeyman, talks to a group of Airmen assigned to the 317th Airlift Wing about post attack reconnaissance during an exercise at Dyess Air Force Base, Texas, Nov. 7, 2018. During the training scenario, Airmen learned how to stay safe in a chemically exposed environment and how to test which chemical is in the area using M8 detector paper. (U.S. Air Force photo by Airman 1st Class Kylee Thomas)