Constant Focus A Marine scans his sector of fire during amphibious assault integration training at Marine Corps Base Camp Pendleton, Calif., April 13, 2017. Marine Corps photo by Cpl. Frank Cordoba SHARE: Download: Full Size (1.97 MB) Tags: Marines, training, Marine Corps Credit: Cpl. Frank Cordoba VIRIN: 170413-M-DJ953-0138A.JPG Photo Gallery