The U.S. didn’t want the Soviets to locate and exploit two sunken submarines - USS Thresher and the USS Scorpion.
When oceanographer Bob Ballard uncovered the world's most famous shipwreck in 1985, he grabbed the globe's attention. But in reality the explorer's search for the Titanic was a cover-up for a top-secret mission for the U.S. government.
Ballard reveals he was hired to use his advanced robotic sub to check on the status of two nuclear submarines, the USS Thresher and the USS Scorpion, that sank in the Atlantic in the 1960s.
The Navy didn't want the Soviets to know they were looking for these nuclear subs.
The guise of searching for the Titanic's wreckage provided a perfect alibi for the intensified presence of U.S. ships on the Atlantic.
The Navy made a deal with Ballard. After his submarine search was concluded, it would fund an expedition to find the Titanic and now a National Geographic documentary called "Titanic: The Final Secret" follows the true story of the search and recovery of the 1912 shipwreck.
More of the story here.