In this 2007 file photo provided by the U.S. Navy, the research submarine NR-1 is moored at U.S. Naval submarine base, in New London, Conn. The nuclear-powered NR-1, launched in Groton in 1969, was one of the most secretive vessels in the U.S. undersea force.
In this 2007 file photo provided by the U.S. Navy, the research submarine NR-1 is moored at U.S. Naval submarine base, in New London, Conn. The nuclear-powered NR-1, launched in Groton in 1969, was one of the most secretive vessels in the U.S. undersea force.
Photo by Associated Press /Chattanooga Times Free Press .
published Wednesday, November 13th, 2013
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GROTON, Conn. — It could dive deeper than any other submarine, and when it reached the ocean floor, the one-of-a-kind Navy vessel could roll on wheels with lights illuminating the depths outside its windows.

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