Adam's Mom/Susan,
I can only begin to try to feel what it is that you are going through having put me own parents through this(going on tour) 4 times already. Remember that you are not alone in this as many others have said, and that your son is a well trained soldier.
From 1994 to 2004 I was part of 2RCR, the infantry battalion that your son has been deployed with. They are a first rate bunch of guys and the Sr NCMs will look out for your son as well as the rest of the section. I could say don't worry, but that would be foolish and wrong. It is natural to feel worried, but the best that you can do is to be there when you can for Adam, but don't ever get upset with yourself if you miss a call he will call back when he has time to do so. Keep your head up and forget the fact that these coworkers don't understand, there will always be someone to call, e-mail, or write to when things get rough for you. You will come through this fine and be a stronger person for it and so will Adam.
If you need to talk or have some questions then send me a pm and I will be sure to answer it soon.
Chilly