Steven Spielberg has built an unrivaled catalogue of groundbreaking films over the course of his nearly 50-year career. He opens up about his bittersweet childhood and lifelong obsession with moviemaking, his precocious early work as a TV "wunderkind," his rise to fame through an incredible string of blockbusters, his later forays into more serious dramatic films, and the personal and professional relationships he's cultivated through the years.