Dr. Robert Ballard reveals the details behind his top-secret assignment and explains how the search for Titanic became the cover story.
Titanic: Ballard's Secret Mission
The Titanic Discovery: Professor Robert Ballard
ghosts of the black sea
Robert Ballard on Global Warming: It's too late
Titanic The Nightmare and the Dream
On exploring the oceans - Robert Ballard
Secrets Of The Dead - Quest For Noah's Flood