Tech. Sgt. Shawn Hyde, 436th Civil Engineer Squadron horizontal shop noncommissioned officer in charge, and Staff Sgt. Alexander Oelfke, 436th Security Forces Squadron investigator, examine a simulated breach in the base’s perimeter fence Nov. 18, 2020, at Dover Air Force Base, Delaware. The exercise entailed 24-hour operations and consisted of an array of scenarios to test the base’s emergency response capabilities, satisfying multiple annual requirements. (U.S. Air Force photo by Roland Balik)