On July 30, 1945, the USS Indianapolis was torpedoed by a Japanese submarine. Over 800 sailors were stranded on the open sea, facing devastating conditions and hungry sharks. Only 316 sailors were rescued. The final resting place of the Indianapolis was a mystery - until 70 years later when new technology and research led to a breakthrough, in this episode of History’s Greatest Mysteries: Solved, a new History digital original series. | HISTORY