A U.S. Marine with Headquarters Company, Headquarters Battalion, 3rd Marine Division, sights in while posting 360-degree security during a patrol at the Jungle Warfare Training Center, Camp Gonsalves, Okinawa, Japan, June 28, 2018.
The Marines participated in a one week course to improve their jungle survival skills. (U.S. Marine Corps photo by Sgt. Brian Burdett). Original public domain image from Flickr