Staff Sgt. Arianna Ruiz and Staff Sgt. Franklin Walton,

Staff Sgt. Arianna Ruiz and Staff Sgt. Franklin Walton, 51st Security Forces members, secure a building of enemy threats during a counter surveillance scenario for an operation readiness exercise, Beverly Bulldog 13-02 at Osan Air Base, South Korea, Feb. 12, 2013. Counter surveillance scenarios are conducted to help train SF airmen to deny opposing forces entry to the base and OREs test Osan airmen’s abilities during a heightened state of readiness while providing combat ready forces for close air support, air strike control, counter air, interdiction, theater airlift, and communications in the defense of South Korea. (U.S. Air Force photo/Staff Sgt. Sara Csurilla)