A U.S. Marine Corps Mountain Warfare Instructor with Marine Corps Mountain Warfare Training Center (MCMWTC) teaches Marines with 4th Reconnaissance Battalion, 4th Marine Division, to safely filter dirty water during Mountain Exercise (MTX) 4-23 at MCMWTC, Bridgeport, California, June 11, 2023. MTX is designed to enhance maneuver capabilities, the conduct of expeditionary advanced base operations and logistical supply and support operations in an austere environment in accordance with Force Design 2030. (U.S. Marine Corps photo by Lance Cpl. Richard PerezGa