Air Force Staff Sgt. Gary Allsbrook shakes the fence to check the tactical automated security system during a security patrol on the flightline at Bagram Airfield, Afghanistan, June 27, 2016. Allsbrook and other security forces airmen conduct daily checks on the TASS systems to assure it operates properly. Allsbrook is assigned to the 455th Expeditionary Security Forces Squadron, quick reaction force. Air Force photo by Senior Airman Justyn M. Freeman