usairforce:

U.S. Air Force Tech. Sgt. Johnnie Payton, a 374th Security Forces Squadron Airman, radios information back to the base defense operations center March 14, 2012, during an emergency management exercise

retrowar:

Sailors assigned to the visit, board, search, and seizure team of the guided-missile destroyer USS Halsey (DDG 97) demonstrate how to conduct security while carrying a casualty

plausible-deniability:

A U.S. Army Designated Marksman pulls security with his M14 EBR during a patrol.

usairforce:

Military working dog handler and his dog, Uran, assigned to the 376th Expeditionary Security Forces Squadron

usairforce:

Airman First Class Matthew May, 51st Security Forces Osan Air Base, Republic of Korea, mans an M-60 machine gun at a defensive firing position during the early morning hours of Osan’s IRRE/CERE (Initial Response Readiness Exercise/ Combat Employment Readiness Exercise) exercise.  (USAF photo by Staff Sgt. Justin D. Pyle)  (RELEASED)