One 109 years ago today, the RMS Titanic slipped below the icy waters of the North Atlantic after striking an iceberg. Close to 1,500 passengers and crew were lost, making the sinking the deadliest peacetime sinking of a passenger liner in history.
The Titanic had sailed from Southampton, UK five days earlier on April 10th. Coincidentally, 51 years later, on April 10, 1963, the nuclear attack submarine USS Thresher sank during deep-diving tests killing all 129 crew and shipyard personnel aboard. Also coincidentally, the Thresher sank relatively close to the wreck of the Titanic, although when the submarine sank, no one knew quite how close.