150325-N-ZZ999-200 WATERS NEAR GUAM Arleigh Burke-class guided-missile destroyer USS Sampson fires thier 5-inch gun during Multi-Sail 2015. Multi-Sail is an annual Destroyer Squadron 15 exercise designed to assess combat systems, improve teamwork and increase warfighting capabilities in the U.S. 7th Fleet area of responsibility. Japan Maritime Self-Defense Force is participating in Multi-Sail for the first time to improve interoperability and strengthen U.S.-Japan alliance.