Standing watch
Staff Sgt. Zachary Lindquist, 911th Security Forces Squadron patrolman, apprehends a suspect during a chemical, biological, radiological, nuclear and explosives exercise here, October 4, 2015. Lindquist and fellow SFS airmen are trained and ready to counter threats to any Air Force installation on which they are stationed. (U.S. Air Force photo by Staff Sergeant Justyne Obeldobel)