190612-M-IB436-2242 CAMP FUJI, Japan (June 11, 2019) U.S. Marines assigned to the 4th Marine Regiment, 3rd Marine Division under the Unit Deployment Program, stand behind a wooden shield during an urban-breaching range as part of Exercise Fuji Viper at Combined Arms Training Center, Camp Fuji, Japan, June 12, 2019. Marines train in urban-breaching to increase proficiency in house-to-house style fighting. (U.S. Marine Corps photo by Lance Cpl. Joshua Sechser/Released)