A U.S Marine with 1st Battalion, 3rd Marine Regiment, currently with 4th Marine Regiment under the Unit Deployment Program, provides security during the final exercise during a scout swimmer course conducted on Camp Courtney, Okinawa, Japan, May 3, 2019.
The Marines participating in the scout swimmer course were tasked with inserting, securing, and withdrawing from the beach. (U.S Marine Corps photo by Lance Cpl. Christian Ayers) Original public domain image from Flickr