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General Dynamics wins $497 mln U.S. defense contract -Pentagon

WASHINGTON, May 20 (Reuters) - General Dynamics Electric Boat won a $497 million U.S. defense contract, the Pentagon said on Monday.

The contract, which modified a previously awarded contract, is for a submarine industrial base development and expansion in support of Columbia-class fleet ballistic missile submarines, as well as the nuclear shipbuilding enterprise, the Pentagon said in a statement. (Reporting by Makini Brice; Editing by Eric Beech)