You may have seen this already, but if not, take some time (about 5 minutes I think) and watch it. This is a video made by a 15 yr old girl and is really worth your time.
I was warned to have my kleenex ready and didn't pay attention. Maybe it's just because I'm pregnant and emotional. Maybe it's because I'm now a mother to a soldier. But tearjerker stuff doesn't usually make me cry and this one really did. So be ready.