CBS NEWS
CBS: Inside the U.S. Navy's newest, fastest submarines
Russia announced plans last month to build a submarine larger than its typhoon class, which is already the world's biggest nuclear-powered submarine.
The United States is also deploying a new generation of submarines, the Virginia class.
The U.S. Navy commissioned the world's first nuclear submarine in the 1950s, the USS Nautilus. It was actually the first nuclear-powered anything. Parts of it are even still classified.
Now it's open to visitors to explore and is moored next to the U.S. Navy base.
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WNU Editor: I am still trying to digest the idea that each Virginia-class submarine costs $2 billion to build.