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GAO reviewed the Navy's Seawolf (SSN-21) Class Nuclear-Powered Attack Submarine construction program, focusing on: (1) the change in the status of the class design and SSN-21 construction since December 1991; (2) the effectiveness of technical and management actions to resolve lead submarine welding problems and guard against a recurrence of a similar problem in the future; and (3) Navy efforts to control schedule delays.

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