The fast and furious "Iron Man 3," opening in U.S. theaters Friday, is a superior comic book movie packed with dazzling effects and relentlessly thrilling action sequences. Director Shane Black (writer of "Lethal Weapon") and leading man Robert Downey, Jr., find the right mix of humor and heroics. What's more, the film has not one but two effective villains -- Guy Pierce as mad scientist Aldrich Killian and Ben Kingsley as criminal mastermind The Mandarin.
But the real star of the film is, as always, that endlessly intriguing piece of high-tech hardware -- the Iron Man suit. How much of Tony Stark's signature creation is science, and how much is fiction? We take a look at the iconic features of the Iron Man armor, and the real-world science behind them.