DIRECTOR JAMES CAMERON on PAPUA NEW GUINEA

It was early 2012 and I was doing a series of dives in submersibles all over the world.

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My expedition fellow Andrew Wight said, 'Have you ever been to Papua New Guinea? There's [the New Britain Trench] there, and it's five miles deep.' We decided to do our trial dives there, with our equipment coming through the city of Rabaul, on the island of New Britain. I heard that the Indigenous Baining people were in the mountains, and a local guide negotiated with the elders to let us go up there and film their fire ceremony [for my expedition documentary