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A Los Angeles-class fast attack submarine is participats in Exercise Keen Sword with Submarine Group 7 and Japan Maritime Self-Defense Force (JMSDF) Sailors and staff. Keen Sword, which began Oct. 29, is a joint/bilateral training exercise between the U.S. military and their JSDF counterparts. For the submarine force, it is an opportunity to demonstrate how both countries' submariners would detect, locate, track and engage enemy assets.