An Army crew chief briefs Marines on how to board and ride in an Army UH-60 Black Hawk helicopter during the 4th Marine Division Annual Rifle Squad Competition at Joint Base Elmendorf-Richardson, Anchorage, Alaska, Aug. 2, 2018. The Marines are assigned to the 4th Marine Division. The competition was designed to evaluate a 14-man infantry squad throughout an extensive field and live-fire evolution. Marine Corps photo by Lance Cpl. Samantha Schwoch