WDAY: The News Leader

Published April 05, 2013, 08:53 AM

US sub sinking 50 years ago led to safety changes

KITTERY, Maine (AP) — The first sign of trouble for the USS Thresher was a garbled message about a "minor difficulty" after the nuclear-powered submarine descended to about 1,000 feet on what was supposed to be a routine test dive off Cape Cod.

By: DAVID SHARP,Associated Press, Associated Press

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