U.S. Marine Lance Cpl. Nickolas Brown, a rifleman with

U.S. Marine Lance Cpl. Nickolas Brown, a rifleman with 2nd Battalion, 4th Marines, 5th Marine Regiment, holds security on a hallway during a training evolution at the Infantry Immersion Trainer, Marine Corps Base Camp Pendleton, California, July 10, 2019. The IIT is an urban training area with various complexes that provide realistic and situational training to the various infantry units housed on MCB Camp Pendleton. (U.S. Marine Corps photo by Cpl. Dylan Chagnon)