"Titanic" film director James Cameron gives two thumbs-up as he emerges from the Deepsea Challenger submersible after his successful solo dive to the deepest-known point on Earth, reaching the bottom of the Pacific Ocean's Mariana Trench southwest of Guam in a specially designed submarine in this photograph released March 26, 2012. REUTERS/Mark Thiessen/National Geographic/Handout

Full Story: Director James Cameron awestruck at ocean's deepest spot