"FILE - In this April 11, 2011 file photo, director James Cameron speaks at the National Association of Broadcasters convention in Las Vegas. Cameron tells National Geographic News that his specially designed submarine called ""Deepsea Challenger"" completed the nearly 7-mile test dive Wednesday March 22, 2012. The team returned to calmer waters and was headed back to the site Saturday. (AP Photo/Julie Jacobson, file)"
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