11th WG Airmen step up ATSO training
Senior Airman Christian Willis, 11th Security Forces Squadron training instructor, fires blank rounds from a M240B machine gun mounted to a Humvee during the Ability to Survive and Operate exercise on Joint Base Andrews, Md., Jan. 25, 2018. The ATSO was designed to be as realistic as possible to increase quality of training. (U.S. Air Force photo by Airman Michael S. Murphy)