U.S. Marines with Combat Logistics Battalion 13, 1st Marine Logistics Group shoot their rifles during a Battle Site Zero exercise during Integrated Training Exercise (ITX) 2-15 at Camp Wilson on Twentynine Palms, Calif., Jan. 21, 2015. ITX 2-15, executed by Special Purpose Marine Air Ground Task Force 4, is conducted to enhance the integration and warfighting capability of all elements of the Marine Air Ground Task Force. (U.S. Marine Corps photo by Lance Cpl. Kathryn Howard, 1st Marine Logistics Group Combat Camera/Released)