Part 6/8:
Amidst growing challenges, Robert Ballard re-entered the scene. He had a clandestine deal with the U.S. Navy to locate two nuclear submarines lost in the 1960s, allowing him eventual permission to search for the Titanic. Armed with advanced technology—specifically an unmanned sub called "Argo"—Ballard employed an innovative approach: rather than searching for the ship directly, he retraced the debris field to lead him back to the wreck.