Service members assigned to the San Francisco-based Coast Guard Port Security Unit 312 staff an entry control point at Naval Base Port Hueneme, California, in support of Exercise Pacific Blitz 2019 (PacBlitz19), March 7, 2019. PSUs provide waterborne and land-based Anti-Terrorism and Force Protection (AT/FP) for shipping and critical port facilities in conjunction with harbor defense and coastal sea control operations at the end points of United States’ Sea Lines of Communications. (U.S. Coast Guard photo by Petty Officer 1st Class Matthew S. Masaschi).