A Marine with 3rd Battalion, 25th Marines, 4th Marine Division, ground guides a Humvee on Range 400 during Integrated Training Exercise (ITX) 4-21 at Marine Corps Air Ground Combat Center, Twentynine Palms, California on July 22. ITX is the culmination of Marine Forces Reserve units’ training cycle as they participate in a live-fire, combined arms exercise as a part of an integrated Marine Air Ground Task Force. (U.S. Marine Corps photo by Sgt. JVonnta Taylor)