Defenders train to deny enemy forces Published Feb. 13, 2013 By Staff Sgt. Sara Csurilla 51st Fighter Wing Public Affairs OSAN AIR BASE, Republic of Korea -- Airmen from the 51st Security Forces Squadron worked together during a counter surveillance scenario during an operation readiness exercise, Beverly Bulldog 13-02 at Osan Air Base, Republic of Korea, Feb. 12, 2013. Counter surveillance scenarios are conducted to help train SF to deny opposing forces entry to the base in a heightened state readiness. Apart from manning entry control points and denying enemy forces access, SF Airmen patrol Osan to protect and defend Airmen and their families on the base.