Photo by Cpl. Sarah Grawcock - U.S. Marine Corps Sgt. Jesse Pena, a military working dog handler with Headquarters and Headquarters Squadron, Marine Corps Air Station Iwakuni, and a native of Texas, plays with his military working dog during an obstacle course at MCAS Iwakuni, Japan, Jan. 20, 2026. Obstacle course training is designed to instill confidence in military working dogs while also displaying operational readiness by enhancing the obedience and threat response of their K9s. (U.S. Marine Corps photo by Cpl. Sarah Grawcock)