Photo by Mark Thiessen/National Geographic

Explorer and filmmaker James Cameron emerges from the hatch of DEEPSEA CHALLENGER during testing of the submersible in Jervis Bay, south of Sydney, Australia. In the coming weeks the vessel will travel to the bottom of the Mariana Trench and is the centerpiece of DEEPSEA CHALLENGE, a joint scientific project by Cameron, the National Geographic Society and Rolex to conduct deep-ocean research.