Cameron said this morning during a post-dive press conference held aboard the Octopus, a yacht owned by Microsoft co-founder Paul Allen, a longtime Cameron friend. (Allen was on the scene for the historic dive and posted live updates of the event on Twitter from aboard his yacht, which provided backup support for the mission.) 

You just gotta love wealthy adventurers.  Makes me wonder why no government ever cared to see what lies at the bottom of the world?