Service members from Coast Guard Port Security Unit 312, based in San Francisco, fire their M4 service rifles maintaining their weapons qualifications during a range session in Port Mugu, California, March 8, 2019. Coast Guardsmen assigned to Port Security Units train and prepare for global deployment supporting Department of Defense combatant commanders around the world conducting unique and critical defense missions including waterborne and land-based Anti-Terrorism and Force Protection as part of tailored force packages. (U.S. Coast Guard photo by Petty Officer 1st Class Matthew S. Masaschi).