 In 2012, Cameron became the first person to perform a solo descent to the bottom of the Mariana Trench, the deepest part of the Earth's ocean, in the "Deepsea Challenger" submersible.In total, Cameron's films have grossed approximately US$2 billion in North America and US$6 billion worldwide.Cameron's "Avatar" and "Titanic" are the second and third highest-grossing films of all time, earning $2.78 billion and $2.19 billion, respectively.