#OnThisDay in 1964, the submarine USS Thresher was located and photographed. It had sunk the year before, during a drive test, killing all 129 crew members. Watch the 2019 USS Thresher Memorial dedication at Arlington National Cemetery: c-span.org/video/?464747-1/arlington-cemetery-dedication-uss-thresher-memorial | American History TV

1.3K views · 44 reactions | This weekend, watch the recent Arlington National Cemetery ceremony held to dedicate a memorial to the 129 people who died on USS Thresher, a nuclear-powered submarine which broke up underwater on April 10, 1963 approximately 220 miles east of Boston. Saturday 10:30pm & Sunday 4:30pm ET on C-SPAN 3. | American History TV | Facebook

#OTD in 1961, USS Thresher (SSN 593) was commissioned. Thresher was lost with all hands on April 10, 1963 during deep-diving tests about 220 miles east of Cape Cod, Massachusetts - #USSThresher's remains were located about 8,400 feet below the surface on the sea floor. The loss of #Thresher led to the Navy establishing the Submarine Safety Program (SUBSAFE), to provide maximum reasonable assurance that submarine hulls will maintain watertight integrity, and that the boats can recover from unanti