Artist rendering of the future Columbia-class nuclear-armed ballistic missile submarine (SSBN), which will replace the Ohio-class submarines. Construction work on the submarine program helped drive first quareter sales at GD. (Illustration: U.S. Navy)
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Faulty missile tubes that earlier consumed months of schedule margin on the next-generation U.S. nuclear-armed, ballistic missile submarines are not pacing the schedule for the boats anymore, the admiral in charge of the U.S. program said Thursday.
“I retain…