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The Los Angeles-class fast attack submarine USS Oklahoma City (SSN 723), assigned to Commander, Submarine Squadron 15, steams ahead of U.S., Japan Maritime Self-Defense Force (JMSDF), and Indian ships during the Malabar 2019 Photo Exercise (PHOTOEX). An annual, multinational, naval field training exercise, Malabar is designed to improve the collective maritime relationship between the JMSDF, Indian and U.S. navies.