The film follows a bomb squad in Iraq. There's a kind of overarching narrative that revolves around a bomb specialist, but it's not overbearing - the movie is more episodic in nature, showing a series of day in the life of the characters. There are three main guys that the movie is focused on, but also a cast of surprisingly well defined minor characters. It's a really subtle, well done film, with the various characters contrasting with each other in really fascinating ways. It's through the characters, and their interactions, that the movie investigates the nature of modern warfare, the clash of cultures, and the meaning of heroism. I was really impressed by Jarhead (the book, rather than the movie, though that was aight) for the way in which it reflected on what being in war, and the training to go there, does to people, but I have to say, this movie does it in a much more interesting way. Finally, the film's eye for detail is incredible, and the cinematography is poignant. It's a really, really good movie.
P.S. I am, by the way, totally fascinated by Kathryn Bigelow, the director. She is also responsible for K-19: The Widowmaker, which I believe is the most expensive film ever made by a female director, Strange Days (added to the Netflix queue), Blue Steel, and Point Break. If that doesn't intrigue you, then, well, you're very different from me. I would love to know more about her - I've looked around for interviews, and this one is kind of interesting, but very short. Not that I have any idea what I'd like to ask her, and I suppose she sort of speaks for herself through her films, but yeah, I wanna hear more of what she has to say.