180601-N-NT795-437 IMPERIAL BEACH, Calif., (June 1, 2018) Rear Adm. Russel Allen, reserve director for warfare systems (OPNAV N9R), fires the M240 machine gun simulator during a visit to Coastal Riverine Group (CRG) 1 in Imperial Beach. CRG provides a core capability to defend designated high value assets throughout the green and blue-water environment and providing deployable Adaptive Force Packages (AFP) worldwide in an integrated, joint and combined theater of operations. (U.S. Navy photo by Chief Boatswain’s Mate Nelson Doromal Jr/Released)