Via the U.S. Naval Institute
On this day in 1963, 129 men were lost when the USS Thresher (SSN-593) sank during deep-dive tests in the Atlantic Ocean. After hearing about the disaster, the young son of skipper CDR John Harvey made this crayon drawing of the sub lying on the ocean floor.
The drawing is now in the collection of the U.S. Navy Museum in Washington, D.C.