It has been almost a month, but because I've been slow to check the internet lately, this news is new to me, and I'm feeling the shock and sympathy for you freshly.
Whenever I hear of a valiant soldier paying the ultimate sacrifice, I think of these things:
For the family directly the Bixby Letter, written by President Lincoln in the Civil War, applies as well to a single child as it does to five:
"Executive Mansion,
Washington, Nov. 21, 1864.
Dear Madam,
I have been shown in the files of the War Department a statement of the Adjutant General of Massachusetts that you are the mother of five sons who have died gloriously on the field of battle. I feel how weak and fruitless must be any word of mine which should attempt to beguile you from the grief of a loss so overwhelming. But I cannot refrain from tendering you the consolation that may be found in the thanks of the Republic they died to save. I pray that our Heavenly Father may assuage the anguish of your bereavement, and leave you only the cherished memory of the loved and lost, and the solemn pride that must be yours to have laid so costly a sacrifice upon the altar of freedom.
Yours, very sincerely and respectfully,
A. Lincoln"
For family and friends who sometimes question the worthiness of service considering the level of sacrifice their loved-one has paid, and even for anti-war protesters (who often wish to denigrate the importance of the service and sacrifice of our soldiers), I point out the George Orwell quote:
"We sleep safely at night because rough men stand ready to visit violence on those who would harm us."
And, I add to this that sometimes the good guys get hurt or killed in this process. Also, I keep in mind how the troops have been fighting this war for 8 years now, and we have a volunteer military, and the vast majority of modern-day service members are 100% behind what we are doing overseas and report that we are making a huge beneficial difference in these countries, in spite of the terrorist whackos who continue the insurgency.
Having been a coroner for 10+ years, I've seen a great deal of death and have notified many people of a relative's demise. This has given me a very clear perspective about life and death. I've learned to accept death as a part of life, that it happens to everyone inevitably, and the main variable is only how and when it happens. This has also made my faith much, much stronger. And, it has also shown me that there is no magic or secret to relieve the suffering of grief at the loss of a loved one.
Therefore, my personal advice is to let the pain happen so you can deal with your sense of loss. Lean on your faith. If you profess none, now is a great time to reconsider. Use the quotes above to clarify and resist any questioning or doubt that arises in your mind, and concentrate on the good memories and supporting his wife and child.
I will pray for your pain to be relieved. That you come to a sense of pride in that your son performed so great a service and sacrifice to protect us and keep our enemies at bay. Thank you for raising such a patriotic man.