WRIGHT-PATTERSON AIR FORCE BASE, Ohio - Staff Sgt. Michael O’Callaghan, 445 SFS, searches for the “gunman.” Four 445th Security Forces Squadron reservists participated in a multi-agency Solo Engagement Training July 11 at the former Marine Corps Reserve training and administrative center located in Dayton, Ohio. The training was hosted by the Wright State University Police Department. (U.S. Air Force photo/Stacy Vaughn)