Infrared Focus Marine Corps Pfc. Merrick Martius maintains the infrared light on an armored vehicle during a live-fire gunnery qualification test on Marine Corps Air Ground Combat Center, Twentynine Palms, Calif., Jan. 22, 2016. Martius is an armored vehicle crewman assigned to the 1st Marine Division's Headquarters and Service Company, 1st Marine Expeditionary Force. Marine Corps photo by Pvt. Robert Bliss SHARE: Download: Full Size (1.09 MB) Credit: Pvt. Robert Bliss VIRIN: 160122-D-HV319-012.JPG Photo Gallery