SEAL BEACH, Calif. (Jan 27, 2022) Master-At-Arms 2nd Class LeVaughn Tisdom, a range line coach assigned to Maritime Expeditionary Security Squadron (MSRON) 11, observes Construction Mechanic 2nd Class Richard Casaus fire a 9mm service pistol during live-fire qualification exercise as part of Security Reaction Force-Basic Course onboard Naval Weapons Station Seal Beach. The Maritime Expeditionary Security Force is a core Navy capability that provides port and harbor security, high value asset security, and maritime security in the coastal and inland waterways. (U.S. Navy photo by Chief Boatswain’s Mate Nelson Doromal Jr.)