U.S. Marine Corps Lance Cpl. Kayden Walker with Company E, Battalion Landing Team, 2nd Battalion, 5th Marines, 31st Marine Expeditionary Unit provides security during amphibious training at Dundee Beach during exercise Talisman Sabre 15 at Fog Bay, Northern Territory, Australia, July 8. Talisman Sabre provides an invaluable opportunity to conduct operations in a combined, joint, and interagency environment that will increase the U.S and Australia’s ability to plan and execute contingency responses, from combat missions to humanitarian efforts. (U.S. Marine Corps photo by MCIPAC Combat Camera Lance Cpl. Eric C. Clayton/Released)