Guam - He's one of only two people to ever have traveled to the deepest part of the ocean, and he's on island to help filmmaker and National Geographic explorer James Cameron. It was 1960 when Don Walsh took the adventure of a lifetime.

He along with Swiss inventor Jacques Piccard piloted the U.S. Navy's bathyscaph Trieste to a spot at the bottom of the Marianas Trench known as The Challenger Deep, just 200 miles southwest of Guam. Walsh said, "After we landed, we stirred up the bottom sediment and it just put a cloud around us. Now, that's happened with every dive, but in a few minutes that cloud of sediment drifts away because there's current. But in this case it didn't it was like sitting in a bowl of milk. After about 20 minutes the view outside did not improve at all. It was like someone had put white paint on the outside of our window, so after that we decided it wasn't going to be productive to stay down there much longer, and that we should get back up there to the surface."

Walsh first encountered now-Oscar winning director Cameron in the early 1980s during the filming of the movie "The Abyss" where Walsh provided consultation at the beginning of the project. The two then collaborated years later for the movie "Titanic." Five years ago Cameron again sought out the help of Walsh for a project on the Challenger Deep and signed a disclosure agreement. Walsh didn't hear anything on the project until January.

"And I said, 'Jim you signed me on to a non-disclosure agreement and then you didn't disclose anything'. I didn't know anything about it except the rumors that I hear," he recalled.

Walsh says his trip in the 60s to the deepest part of the ocean took a little over three hours, but with the latest technology, Cameron may make the trip in two. Once at the bottom, Cameron is expected to spend five to six hours where he will research for science a 3-D feature film for theatrical release. When asked what advice he had, Walsh said simply, "Have fun!"

He continued, "When you're an explorer the very act of exploring is to find things you didn't expect. You can suspect things, I guess, like if there's going to be life down there it's going to be unusual probably things no ones ever seen. Why? Because only two people have ever been there before, and so you can make a very general or broad supposition that there's going to be something that we've never seen before. But what do we hope to find? Stay tuned!"

It's been confirmed that Cameron is on island and a team of scientists from the island and all over the world will take part in the adventure.