According to a report on http://news.nationalgeographic.com, explorer and film maker James Cameron has arrived at the Mariana Trench's Challenger Deep, members of the National Geographic expedition have confirmed. According to the report, his depth on arrival was 35,756 ft. (10,898 m). Cameron is just the third person to reach this Pacific Ocean valley southwest of Guam (map)—and the only one to do so solo. After as long as six hours in the trench, Cameron—best known for creating fictional worlds on film (Avatar, Titanic, The Abyss)—is to jettison steel weights attached to the sub and shoot back to the surface. Upon touchdown at Challenger Deep, Cameron's first target is a phone booth-like unmanned "lander" dropped into the trench hours before his dive.