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The Nimitz-class aircraft carrier USS Ronald Reagan (CVN 76) steams in formation during a photo exercise (PHOTOEX) to conclude Keen Sword 17 (KS17), Nov. 11, 2016. KS17 is a biennial, Chairman of the Joint Chiefs of Staff-directed, U.S. Pacific Command-sponsored Field Training Exercise (FTX). KS17 is designed to meet mutual defense objectives by increasing combat readiness and interoperability between Japan Self-Defense Forces (JSDF) and U.S. Forces. Ronald Reagan is leading the Carrier Strike Group Five (CSG 5) patrol in the Philippine Sea supporting security and stability in the Indo-Asia-Pacific region.