LONG BEACH, Calif. (Sept. 24, 2020) Sailors assigned to Maritime Expeditionary Security Squadron (MSRON) 11, conduct a mass casualty drill as part of Unit Level Training Assessment-Certification (ULTRA-C) provided by the Maritime Expeditionary Security Group (MESG) 1 TEU. 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.)