_ I don’t know as much about the Titanic as about the Lusitania. With the Lusitania there was a mysterious second explosion. the cause of that has never been determined. There was a diver some years ago who had a theory but others say Britain is still withholding key evidence. The ship sits at the bottom of the Irish Sea off the coast of Ireland. Valuable paintings might still be aboard. So this ship is the biggest mystery yet.