IWAKUNI, Japan (Oct. 27, 2021) U.S. Navy corpsmen assigned to Marine Corps Air Station Iwakuni's Naval Medical Readiness Training Unit respond to a simulated casualty during Exercise Active Shield at MCAS Iwakuni, Japan, Oct. 27, 2021. Active Shield is an annual bilateral training exercise designed to test U.S. and Japanese forces in their ability to respond to contingencies and cooperatively address challenges faced by the installation. (U.S. Marine Corps photo by Lance Cpl. Darien Wright)