BB 14-02 tests security measures
Airman 1st Class Cody Linday, left, 51st Security Forces Squadron entry controller, acts as a detained member of opposition forces while A1C David Diez, 51st SFS entry controller, guards him during Operational Readiness Exercise Beverly Bulldog 14-02 at Osan Air Base, Republic of Korea, May 5, 2014. Staff Sgt. Juan Valles, 51st SFS area supervisor, was also part of the training scenario that required himself and Diez to wait for Office of Special Investigations personnel to reach the scene and interrogate their detainee. (U.S. Air Force photo/Airman 1st Class Ashley J. Thum)