Keywords: US Navy 100820-N-9123L-057 Navy Reserve Sailors fire an M2HB .50-caliber machine gun during a live-fire exercise.jpg en SAN CLEMENTE ISLAND Ca Aug 20 2010 Navy Reserve Sailors fire an M2HB 50-caliber machine gun during a live-fire exercise at the Maritime Expeditionary Security Squadron MSRON 1 inaugural training school Shark Tank 2010 Shark Tank is a new series of training exercises designed to hone and teach expeditionary warfare skills U S Navy photo by Mass Communication Specialist 2nd Class Byron C Linder/Released 2010-08-20 100820-N-9123L-057 Navy http //www navy mil/view_image asp id 90636 U S Navy photo by Mass Communication Specialist 2nd Class Byron C Linder PD-USGov-Military-Navy Images from US Navy location SAN CLEMENTE ISLAND Ca Browning M2 of the US Navy Maritime Expeditionary Security Squadrons |