DEFENSE EXERCISE U.S. Navy and Japan Maritime Self Defense Force ships sail in formation during Annual Exercise 2011 in the Pacific Ocean, Nov. 4, 2011. Annual Exercise is a bilateral field-training exercise designed to practice and evaluate the coordination procedures and interoperability elements required to effectively and mutually respond to the defense of Japan, to a regional crisis or contingency situation in the Asia-Pacific region, while building bilateral confidences and working relationships. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 331684-N-QJD29-912.jpg Photo Gallery