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The delivery of Columbia’s stern section is a milestone for the first ballistic missile submarine built for the Navy since the 1990s. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ he first Columbia class submarine stern section has been delivered to General Dynamics Electric Boat. The massive component will serve as the propulsion section of the inaugural Columbia-class nuclear ballistic missile submarine, the USS District of Columbia. The vessel is the first of a planned 12 boat fleet designed to replace the existing 14 Ohio-class boomers in what the Navy says is its top-priority acquisition program. Images of the first stern section were released on Wednesday by...

I was reading about a new Chinese mini sub - a badly needed distraction - and saw a spurious reference to a new US 'Columbia Class' SSBN which was alien to me. Obviously, I'd missed it, and apparently many here as well. I searched and saw no reference whatsoever to it here at FR, so rather than post a single article, there are a number below in the comments for clickable links, in addition to the linked Report to Congress.