Almost unbelievable, but still, here it is: <snip>
When Bob Ballard led a team that pinpointed the wreckage of the liner in 1985 he had already completed his main task of finding out what happened to USS Thresher and USS Scorpion.
Both of the United States Navy vessels sank during the 1960s, killing more than 200 men and giving rise to fears that at least one of them, Scorpion, had been sunk by the USSR.
Dr Ballard, an oceanographer, has admitted that he located and inspected the wrecks for the US Navy in top secret missions before he was allowed to search for the Titanic.
BTW, the pic above is the USS Scorpion, it was the sister ship to the first sub I served on. They were part of the Skipjack class of boats and they were pigs, but I say that with love and with fond memories.