T.R.
My baby brother just did the same thing. After graduating from college, he enlisted in the Marines so he could fly jets. I've found with my 7 year old son that it's best to keep him informed...to a certain extent. My brother writes, calls and visits regularly as possible while he's in training and we do ordinary stuff together...like going to the Mets baseball game. My husband and I also sit down with my son and watch the military channel together. Most of the shows are educational and show the actual training my brother is going through. The shows we watch are about life in the military (endurance training, weapons, sleeping quarters, etc...nothing too violent). We're also going to Washington DC for my brother's graduation. He's still a huge part of my family, even though he's miles away...and this has helped my son a great deal.