A U.S. Navy Nuclear Submarine Was ‘Shattered Into 5 Pieces’

What You Need to Know: In April 1963, the USS Thresher, a state-of-the-art nuclear-powered submarine, tragically sank during dive trials off Cape Cod, Massachusetts, claiming the lives of 129 crew members.

-Despite its advanced sonar systems and the powerful S5W reactor, the Thresher encountered issues during a second dive and failed to resurface.

-After a two-month search, its wreckage was found 8,400 feet below the sea, shattered into five pieces.

-The cause of the disaster remains uncertain...