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United States S-class submarine - Wikipedia
List of submarine classes of the United States Navy - Wikipedia
The U.S. Navy's Lafayette-Class Submarines Went All Out to Beat …
Attack Submarines - SSN > United States Navy > Displayy …
Submarines in the United States Navy - Wikipedia
Fleet Ballistic Missile Submarines - SSBN > United States Navy ...
Columbia-Class: The Navy's New $132 Billion Submarine Could …
New US Subs Running $17 Billion Over Budget, Lawmaker Says