Test Fire The USS Porter test fires its 5-inch gun while operating in the Mediterranean Sea, April 30, 2016. The guided-missile destroyer is patrolling in the U.S. 6th Fleet area of operations to support U.S. national security interests in Europe. Navy photo by Petty Officer 3rd Class Robert S. Price SHARE: Download: Full Size (0.87 MB) Credit: Navy Petty Officer 3rd Class Robert S. John Price VIRIN: 160430-N-FQ994-361C.JPG Photo Gallery