Guard security forces members protect exercise participants
Staff Sgt. Josh Hartzell and Senior Airman Vanessa Garcia provide perimeter security for the Avenger air defense missile system during Exercise Ardent Sentry '10 May 15, 2010, in Savannah, Ga. Sergeant Hartzel l and Airman Garcia are from the 165th Security Forces Squadron. (U.S. Air Force photo/Tech. Sgt. Anika Williams)