Safety Briefing A Marine briefs his team on range safety during a live-fire range exercise during Midori Guardian 17 in South Korea, Oct. 10, 2017. Marine Corps photo by Sgt. Laura Gauna SHARE: Download: Full Size (0.3 MB) Tags: Marines, Midori Guardian 17, Marine Corps Credit: Sgt. Laura Gauna VIRIN: 171010-M-KO203-511.JPG Photo Gallery