James Cameron's big-budget (and even bigger-grossing) films create unreal worlds all their own. In this personal talk, he reveals his childhood fascination with the fantastic -- from reading science fiction to deep-sea diving -- and how it ultimately drove the success of his blockbuster hits "Aliens," "The Terminator," "Titanic" and "Avatar."

James Cameron is the director of Avatar, Titanic, Terminator, The Abyss and many other blockbusters. While his outsize films push the bounds of technology, they're always anchored in human stories with heart and soul.