GUN FIRE The guided-missile destroyer USS Cole fires its MK 45 5-inch lightweight gun during an exercise in the Mediterranean Sea, Dec. 12, 2014. The Cole is conducting naval operations in the U.S. 6th Fleet area of responsibility to support U.S. national security interests in Europe. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 324293-K-ZUB10-918.jpg Photo Gallery