Iron Man is a classic comic book. In the movie adaption, Tony Stark is forced to create a life support suit to keep him alive after an accident, he decides to use the technology in his suit to fight crime.
They say the best weapon is one you never have to fire. I respectfully disagree. I prefer the weapon you only need to fire once. That's how dad did it, that's how America does it, and it's worked out pretty well so far.