Petty Officer 3rd Class Matthew Kaczynski mans a .50-caliber machine gun. U.S. Navy Petty Officer 3rd Class Matthew Kaczynski mans a .50-caliber machine gun during a demonstration at Naval Amphibious Base Little Creek, Va., on May 10, 2006. The squadron's primary mission is anti-terrorism and force protection in harbors and coastal waterways overseas, such as, Korea, the Persian Gulf and the Horn of Africa. Kaczynski is a Navy master-at- arms with Inshore Boat Unit 42, Naval Coastal Warfare Squadron 4. SHARE: Download: Full Size (0.1 MB) Credit: VIRIN: 299227-G-VNC17-365.jpg Photo Gallery