While there have been several deadly submarine disasters, the 1963 loss of the USS Thresher along with its 129 crew is the worst of them.

The USS Thresher was one of the most advanced submarines in the U.S. Navy, but it suffered catastrophic failure during a test. Here's what we know about it.

This happened, not once, but twice, when two nuclear submarines were lost: the USS Thresher (SSN-593) and the USS Scorpion (SS-589). The loss of a nuclear submarine is catastrophic for a number of ...