Marines with Battery F, 2nd Battalion, 11th Marine Regiment, 1st Marine Division, fire an M777 Howitzer as a part of Desert Fire Exercise in preparation for Steel Knight at Marine Corps Air Ground Combat Center Twentynine Palms, Calif., on Dec. 6, 2015. The tough, realistic training is intended to develop combat skills necessary to operate as the ground combat element of the I Marine Expeditionary Force.
<br>Unit: I Marine Expeditionary Force
Lance Cpl. Timothy Valero
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