Warrior of the Week – Staff Sgt. Dennis Sierens Published June 2, 2010 VANCE AIR FORCE BASE, Okla. -- Name: Staff Sgt. Dennis Sierens Duty title: Flight chief, 71st Security Forces Squadron Hometown: Jacksonville Beach, Fla. Favorite PT regimen: Running Mission accomplishments: Sergeant Sierens established and controlled a flightline Free Zone for the 71st Flying Training Wing change of command ceremony, assuring top-rate force protection for the event. He assisted squadron leaders in providing feedback for two "part-task training" scenarios preparing the unit and Wing for the recent command-wide active-shooter exercise. Sergeant Sierens served as the incident commander for the active-shooter exercise, deploying and controlling all first responders to the headquarters building, ensuring evacuation of the building and the safety of the occupants.