Sea of Hebrides The guided-missile destroyer USS Donald Cook fires the Mark 45 5-inch gun during a naval surface fire support qualification in the Sea of Hebrides, Sept. 28, 2017. The Cook is supporting U.S. national security interests in Europe. Navy photo by Petty Officer 1st Class Theron J. Godbold SHARE: Download: Full Size (0.96 MB) Credit: Petty Officer 1st Class Theron J. Godbold VIRIN: 170928-N-FP878-266C.JPG Photo Gallery