Trench Digger Navy Petty Officer First Class Karla Quintero digs a hole in the sand during preventive medicine training at Red Beach, Camp Pendleton, Calif., Oct. 31, 2018. Marine Corps Lance Cpl. Betzabeth Y. Galvan SHARE: Download: Full Size (3.07 MB) Tags: Training Credit: Lance Cpl. Betzabeth Galvan VIRIN: 181031-M-ZD670-287C.JPG Photo Gallery