James Cameron reveals new information about Titanic sub disaster

A year on from the OceanGate sub tragedy, there are still so many unanswered questions. Most fundamentally, why did the strange-looking craft on a mission to the wreck of the Titanic fail so spectacularly? And why, for days on end, was the world wrongly led to believe there was hope for a successful rescue mission? The lack of credible information about what really happened is now becoming increasingly unfathomable, not only for the families of the victims, but also for other undersea explorers like legendary Hollywood director James Cameron. Speaking exclusively to 60 Minutes, Cameron reveals that this is a catastrophe that could and should have been avoided.