Life in the Infantry U.S. Marines with 3rd Battalion, 4th Marines, 7th Marine Regiment, 1st Marine Division, conduct urban lane training at Range 220 during Integrated Training Exercise (ITX) 5-20 at Marine Corps Air Ground Combat Center (MCAGCC), Twentynine Palms, Calif., June 1-3, 2020. ITX is the most comprehensive training conducted at MCAGCC and focuses on the tactical application of combined-arms maneuver, offensive and defensive operations during combat. (U.S. Marine Corps video by Lance