Titanic: The secret Cold War mission that ended with the discovery of the remains of the most famous ship of all time.

The Titanic, arguably the most famous ship in history, continues to inspire fascination even more than 100 years after its sinking. At the time, the Titanic was the largest passenger ship in the world and became infamous for sinking on its maiden voyage from Southampton, UK, to New York, USA, between April 14 and 15, 1912. More than 1,500 people died in the tragedy. The legend of the ship originated in the wake of its sinking. Robert Ballard, who was part of covert missions for the US Navy, had the courage to embark on the greatest adventure of his life: discovering the remains of the Titanic. He told Ronald Thunman, the Navy's second-in-command of naval operations, so. "That's crazy!" was Thunman's first response, as he recalled the incident in a recent interview with CBS. Ballard, however, had to accept Thunman's request under one condition.