Amphibious Assault Rehearsal
Marines rehearse amphibious assault operations on Lake Margrethe during Exercise Northern Strike 16 at Camp Grayling, Mich., Aug. 11, 2016. The Marines are assigned to the 25th Marine Regiment. The amphibious training marks a first for Camp Grayling and the Michigan National Guard. Michigan Army National Guard photo by Sgt. 1st Class Helen Miller