Robert Ballard, the explorer who found the wreckage of the Titanic, has just revealed that the expedition was actually a cover story for the US Navy about two lost nuclear submarines:
The Navy was not interested in the Titanic. … I mean, they funded the technology because it had so many military applications. And I was a naval intelligence officer for 30 years, and so I did a lot of missions for the Navy. Many remain classified, my best stuff. Rats …
Yes, the Titanic was a cover for a series of military operations. The Titanic was here, and over here was the Scorpion and over here was the Thresher (as he says this, he arranges three objects on a tabletop, roughly in a line, the center one depicting the Titanic).
And had that not occurred, I probably would not have found the Titanic because they wouldn't have funded me. I mean, if the Titanic was in the Indian Ocean, it'd probably still be in the Indian Ocean. But … it was straddled by two very interesting subs that we had lost — and the Scorpion was lost on war patrol … and it was carrying nuclear weapons. So it was a very hot sub to the Navy …
http://news.nationalgeographic.com/news/2008/06/080602-titanic-secret.html