Outside the wire
Airman 1st Class Leon Simpson, 51st Security Forces Squadron defender, conducts close surveillance of possible enemy movement during an outside-the-wire joint patrol during a Republic of Korea Army exercise near Osan Air Base March 15, 2013. The exercise was in conjunction with Key Resolve and is one of the few times each year when the ROK Army fully mobilizes their Homeland Defense Forces. (U.S. Air Force photo/Senior Airman Alexis Siekert)

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