Fast attack submarine USS Scorpion (SSN 589) sank 53 years ago today, on May 22, 1968, with the loss of all 12 officers and 87 crew. Scorpion was operating near the Azores on her way home to Norfolk, Virginia. Her loss — one of the U.S. Navy’s greatest non-wartime tragedies — was deeply felt in the submarine community and throughout the Navy. Today we honor the memory and sacrifice of our fallen shipmates who gave their lives 53 years ago in service to our country. #OnEternalPatrol | U.S. Naval

Was the disappearance of the USS Scorpion caused by a tragic accident or a deliberate attack? Watch new episodes of #ConspiraciesDecoded Thursdays at 10p on Science Channel. | Science Channel