Tunnel Translucence As seen through a night-vision device, Marines clear rooms during a simulated assault of an underground tunnel with soldiers during joint chemical, biological, radiological and nuclear defense training as part of Exercise Korea Viper 25 at Camp Stanley, South Korea, May 20, 2025. The recurring exercise demonstrates the U.S. and South Korean militaries' ability to respond as a unified force while strengthening relationships and trust between the allies. SHARE: Download: Full Size (0.92 MB) Tags: SOUTH KOREA, Exercises, partnerships, Army, training, Marine Corps, Indo-Pacific, korea viper 25 Credit: Marine Corps Lance Cpl. Tucker Mocan VIRIN: 250520-M-RI657-1168P.JPG Photo Gallery