Marine Corps Capt. Benjamin Brewster, company commander of Company K, 3rd Battalion, 4th Marine Regiment, 1st Marine Division (MARDIV), directs his fire support team during exercise Steel Knight (SK) 18 at Marine Corps Air Ground Combat Center Twentynine Palms, Calif., Dec. 10, 2017. SK-18 is a division level exercise designed to enhance the command and control and interoperability with the 1st MARDIV, its adjacent units and naval support forces. ( Marine Corps

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