Gil, please give my thanks to your son for everything he's doing to serve our country. I am so glad to hear he is back home! I can't imagine how proud you must be, and whether you think so or not, you do deserve credit for raising such a fine young man. My condolences to the family of SPC Alexander Missildine. We can't ever let ourselves forget these sacrifices.
I don't have kids, but I have a nephew currently deployed in Iraq, and he'll probably be going into combat zones in Syria before long. He's a West Point grad and a Ranger. I know his parents feel the same way about him as you do about your son. Some of you might remember my posts a couple years ago on the Shag about him being shot in the chest (by a US civilian contractor, no less) in Afghanistan during his first tour. He saw all kinds of combat as a Platoon Leader, and survived a suicide bombing on the base, only to be accidentally shot by a damn contractor. But he recovered and isn't letting it slow him down.
I can't say I can fully understand the worry parents must feel for their deployed solider, but I'm pretty close to my nephew, and can at least empathize, even if it's not nearly the same. God bless all the men and women putting themselves in harm's way for our country.