200521-M-DD765-1513 CAMP PENDLETON, Calif. (May 21, 2020) U.S. Marine Corps Staff Sgt. Paul Butcher, an explosive ordnance disposal technician with Task Force Koa Moana 20, calibrates the IVER3-580 Autonomous Underwater Vehicle while conducting an amphibious training event at Camp Pendleton, California, May 21, 2020. The Marines conducted this training to maintain unit readiness in the water and on land in preparation for an upcoming deployment. (U.S. Marine Corps photo by Cpl. Anabel Abreu Rodriguez/Released)