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InstitutionalNorth AmericaJul 06, 2026

GAO: Nuclear Modernization Programs Show Mixed Progress

GAO finds mixed progress across US nuclear modernization programmes including Sentinel, B-21, Columbia-class SSBN and W80-4 warhead. Sentinel and W80-4 face continued delays and cost growth. Columbia SSBN construction advances but supply chain risks remain. Report shapes NNSA/DoD budget debate.

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Nuclear modernization

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