The latest blockbuster to star Robert Downey Jnr, Iron Man 2, has certainly made an impact on the box office and movie-goers alike.

Whether you like the movie or not, at least one thing about it rings true - the plot and the characters provide a striking reflection of today's tech security industry.

Spoiler alert: We do discuss major plot points in this article. If you haven't seen the movie, keep reading at your own risk.

Marvel's metallic superhero was first portrayed on the silver screen by Robert Downey Jr. in 2008's Iron Man.

In that film, playboy industrialist Tony Stark has a crisis of conscience and brings the manufacture of weapons at his defence company to a halt.

To chase down terrorists who have misappropriated his munitions, Stark builds himself an armoured, weaponised exoskeleton suit (that can fly!) and becomes Iron Man, making his invention an object of desire to military profiteers.

The sequel is much the same, with more villains, more conniving and more suits.

A montage catches us up on what's happened since the previous movie: with no country's military able to match Iron Man's technological superiority, Stark's vigilante action and deterrent policy have brought about a worldwide détente.

Since Stark is the only person who knows what makes Iron Man tick, the world's security rests entirely in his hands.

Not surprisingly, the US government wants to reproduce the Iron Man suit for its own militaristic purposes; the debate over private vs public security forms one of the movie's core conflicts.

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