<http://schema.org/alternativeHeadline>
"'Avatar' director dives to the Earth's deepest point in a specially designed submarine, making him the first man to travel alone on the near 7-mile journey to the depths of the Mariana Trench."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/wilderness-resources/videos/james-cameron-reaches-deepest-spot-on-earth>