Cpl. Dustin Bowman and Sgt. Corey Mitchell from Amphibious Combat Vehicle’s new equipment training team at Program Executive Officer Land Systems, perform maintenance on one of the vehicle’s wheels during the logistics demonstration Sept. 11, 2019, at the Amphibious Vehicle Test Branch aboard Camp Pendleton, California. Log Demo is designed to evaluate and correct, if needed, the maintenance and operational manuals for the ACV that will be eventually used by fleet Marines. (U.S. Marine Corps photo by Ashley Calingo)