190423-N-DX868-0224 CAMP PENDLETON, Calif. (April 23, 2019) Sailors from Coastal Riverine Squadron (CRS) 1 conduct category III qualifications on the M2A1 heavy machine gun at Marine Corps Base Camp Pendleton, Calif. CRS-1 is qualifying for future mobilization requirements. (U.S. Navy photo by Hospital Corpsman 1st Class Kenji Shiroma/Released)