We're very pleased to present an episode from Matt 
    Dattilo's excellent blog 
    Today in History Please note that the opinions expressed in this post do 
    not necessarily reflect the views of the author(s).
    
      the USS Scorpion, an American nuclear-powered submarine, sank in the 
      Atlantic Ocean 400 miles southwest of the Azores. This was the second time 
      the US Navy had lost a nuclear-powered attack sub; the first had been the 
      USS Thresher in 1963. Even though almost 40 years has passed since the 
      sinking, mystery still surrounds the story.
      
      Part One, The USS Scorpion SinksThe 
      Scorpion was a Skipjack-class attack submarine. She was small and fast; 
      though the Navy released her top speed as being close to 30 knots, she was 
      probably capable of much more. Her teardrop-shaped hull was new to 
      submarine design when she was laid down in 1958 and when she was 
      commissioned in 1960, she had no equals in the foreign navies of the 
      world.
      
      The Scorpion’s last deployment began on February 15, 1968. She operated 
      with the Sixth Fleet in the Mediterranean Sea until May, when she was 
      ordered home. On May 21, Scorpion was reported to be 50 miles south of the 
      Azores. That was the last time she was heard from.
      
      The distance between the Azores and the naval base at Norfolk, Virginia 
      was six days sailing for the Scorpion, so when she did not turn up in a 
      week after her last transmission, a search was initiated. On June 5, the 
      Scorpion and her crew were presumed lost and her name was taken out of the 
      Naval Vessel Register on June 30. Still no wreckage was found.
      
      

It 
      was not until the end of October that the remains of the Scorpion were 
      found. She was 400 miles southwest of the Azores in more than 10,000 feet 
      of water. The deep-diving research bathyscaphe Trieste was sent to the 
      scene to photograph the wreckage in an effort to determine what caused the 
      sinking. The sub was in two main pieces with the sail and other debris 
      littered on the sea floor nearby. The ship’s nuclear reactor was, and 
      still is, intact.
      
      The Navy concluded that the Scorpion was most likely sunk by one of her 
      own torpedoes. At that time, the primary conventional torpedo carried by 
      US subs was the Mk 37. These torpedoes were discovered to contain 
      potentially faulty batteries that could overheat and cause a detonation of 
      the torpedo’s warhead. It is also possible that one of the torpedoes 
      inadvertently went live in its tube. The normal course of action for the 
      crew would have been to fire the torpedo, which could have been fatal if 
      the torpedo was armed and looked for the nearest target---the Scorpion 
      herself. 
      
      Other theories have been advanced, from paranormal activity associated 
      with the Bermuda Triangle to an attack by a Soviet sub. All that is known 
      for sure is that underwater listening posts in the Atlantic detected a 
      single, large explosion near the area where the Scorpion sank, taking 99 
      lives with her.
      
      The US Navy still monitors the area around the Scorpion for signs of 
      increased radioactivity. In addition to a nuclear reactor, the Scorpion 
      also carried two Mark 45 torpedoes topped with nuclear warheads. These are 
      presumed to still be in the torpedo room and corroded to the point of 
      being insoluble.
      
      
        In our last episode, we discussed the sinking of the USS Scorpion. The 
        focus of the first episode was the facts of the case. In this second 
        half of our story, we will spend time on some of the theories that have 
        been put forth to explain the sinking of Scorpion, which occurred on May 
        22nd, 1968. 
        
        Part Two, The Mystery of the ScorpionThe 
        loss of the USS Scorpion occurred between two momentous events in US 
        history: the assassination of Dr. Martin Luther King on April 4th, 1968 
        and the assassination of Presidential candidate Senator Robert F. 
        Kennedy on June 5th. As a result, coverage of the loss of Scorpion 
        quickly moved from the front page of most American newspapers. This was 
        in stark contrast to the loss of the USS Thresher in 1963, which 
        occurred during a comparatively quiet time in the nation. This may have 
        been to the Pentagon's liking, because even a cursory investigation of 
        the time line of the last cruise of Scorpion would have led to a 
        discussion of the boat's last set of orders, something that was 
        classified at the time.
        
        Originally, Scorpion was due to arrive at Naval Station Norfolk at 
        9:30AM, May 24th. However, after she left the Mediterranean and was on 
        her way home, she received a message from COMSUBLANT, the Navy 
        abbreviation for Commander Submarines Atlantic, ordering her to divert 
        to a location southwest of the Canary Islands, were a group of Soviet 
        Navy warships were operating. This would push back Scorpion's homecoming 
        to May 27th. In his book 'Scorpion Down', author Ed Offley states that 
        these orders, the last Scorpion would ever receive, were sent on May 
        16th.
        
        

Initially, 
        the Navy stated that the search for Scorpion began on May 27th, the day 
        she failed to arrive back at Norfolk. Years later, documents released by 
        the Department of the Defense showed that at least one ship, the USS 
        Josephus Daniels, put to sea on May 18th to search for Scorpion. The 
        same group of documents show that some time between May 18th and May 
        22nd, Scorpion sent a message stating that she was being followed by a 
        Soviet submarine and could not evade the Russian boat. These two facts 
        taken together tell us that the Navy knew as early as May 18th that 
        Scorpion was potentially in trouble, although she did supposedly 
        transmit her position as late as May 21st. Regardless, it is clear that 
        the Navy knew of the loss of Scorpion at least six days before May 27th.
        
        
        According to Offley, this omission on the part of the Navy was 
        intentional for one reason: the top admirals in the Pentagon suspected 
        that Scorpion had been sunk by a Soviet warship. Years later, after the 
        fall of the Soviet Union, some retired Russian admirals claimed that 
        this was, in fact, the case. They stated that Scorpion was attacked as 
        retaliation for the loss of the K-129, a Soviet diesel submarine which 
        sank off the north coast of Hawaii in early 1968. Soviet naval leaders 
        believed the K-129 had been sunk by a group of US destroyers while they 
        were attempting to force the sub to surface. Sinking the USS Scorpion 
        was seen as a means of evening the score without starting World War III.
        
        

A 
        board of inquiry concluded in 1969 that Scorpion was destroyed by a 
        torpedo, likely one of her own. This conclusion was later rejected in 
        favor of a hardware failure, a more generic assumption. There is 
        actually evidence that Scorpion was not a healthy sub at the time of her 
        deployment in February, 1968. Her recent overhaul had been rushed and 
        was done at the naval base in Charleston, SC which at that time had 
        never done an overhaul and a re-fueling on a nuclear-powered submarine. 
        But the wreck found off the Azores gave no clear indication of anything 
        other than a large explosion.
        
        Many other theories exist as to what happened to the USS Scorpion, 
        including the idea that US Navy Warrant Officer John Walker, a Soviet 
        spy who was not caught until 1986, gave Moscow enough detailed 
        information about secret submarine communications that the Russians knew 
        exactly where the Scorpion was most of the time, allowing them to hunt 
        her with ease. It is not known if the information Walker gave the 
        Soviets beginning in 1967 was being used in early 1968, but it is 
        certainly possible.
        
        We will never know what happened in the Atlantic Ocean 400 miles from 
        the Azores in May, 1968. If the USS Scorpion was deliberately attacked 
        by the Soviet Navy, then the cover-up necessary to keep such a fact 
        hidden for more than 40 years is nearly unprecedented in American 
        history. If some hardware failure caused her sinking, then those 
        responsible for her lack of readiness were never brought to task. Either 
        way, an injustice was done.
        
        99 men died on board the USS Scorpion. It is my belief that their 
        families have never been told the truth. For a nation that honors those 
        who died in service to their country, this is unacceptable.