The broken, the insane and the grown (Spoilers!)
For me this movie is about the effects of war on human beings and how superficial normal people are. We have:
* Steven: gets seriously injured in the war and broken by it.
* Nick: gets insane and goes on playing russian roulette.
* Michael: gets to value life more deeply.
And as Michael goes back home, we realize with him that others who have not experienced the horrors of war stayed just as superficial as they were before.
What do you think?
(Grissom): -Are you a terrorist?
(suspect): -Depends, are you terrified?