What's a good movie to show a couple boys about brotherhood?

I work at a group home for teenaged boys with criminal backgrounds. So there are a couple of the kids, 12 and 14 years of age, that are roommates and have gotten pretty close. I think they are very encouraging of one another, have a brotherly relationship and are helping to improve each other's lives. I want to show them some kind of movie about brotherhood - old or new - that might help to encourage that but also be entertaining for them you know? Any ideas? Action movies, drama, whatever? I'm not talking about some stupid comedy that happens to have brothers in it, like Stuck On You or something, it needs to have some kind of a message…