U.S. Marines with Company B, 1st Battalion, 3rd Marine Regiment, exit an assault amphibian vehicle as part of a Battalion Assault Course during an Integrated Training Exercise (ITX) at Marine Corps Air Ground Combat Center Twentynine Palms, Calif., Aug. 11, 2015. ITX is conducted to enhance the integration and warfighting capability from all elements of the Marine Air Ground Task Force. (U.S. Marine Corps photo by Lance Cpl. Clarence A. Leake/Released)