USS Columbia: The US nuclear submarine built to run 42 years without reactor refueling

The United States is in the process of building its advanced Columbia-class submarines, designed to strengthen its nuclear deterrent. These submarines will incorporate a life-of-ship nuclear reactor, which will eliminate the need for mid-life refueling, enhancing operational readiness and lowering long-term costs. Set to replace the older Ohio-class vessels, the first of these submarines is expected to be delivered in 2029, greatly improving stealth capabilities and survivability at sea.