The Thresher dolphins, the submarine warfare qualification device worn by the late Lt. Cmdr. John Harvey, commanding officer of USS Thresher (SSN 593) before its tragic loss, were passed on to Lt ...

What You Need to Know: On April 10, 1963, the USS Thresher, a nuclear-powered submarine, tragically sank during deep-diving tests 220 miles off the coast of Cape Cod, Massachusetts. All 129 crew ...