Marine's Best Friend Marine Corps Cpl. Thomas Obrien gives commands to a military working dog at an obstacle course during a K-9 training event at Marine Corps Air Station Iwakuni, Japan, May 13, 2026. The training is designed to instill confidence in military working dogs while also maintaining mission readiness. SHARE: Download: Full Size (1.31 MB) Tags: dogs, training, marine corps, indo-pacific Credit: Marine Corps Cpl. Sarah Grawcock VIRIN: 260513-M-JK941-9050.JPG Photo Gallery