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The Navy’s top officer Tuesday outlined updates in the service’s strategy to extend the service life of several nuclear-armed Ohio-class ballistic missile submarines (SSBNs) that could result in quicker turnarounds as they look to make up for delays in the new Columbia-class boats. “We were looking at a number between four and five of these PIRAs, as we call them, these Post-Inactivation, Restricted Availabilities. And now the plans changed a bit, and we're going to do one for sure, and…
