In America's shock and horror at Walter Reed there are rules. I will give you the four that I believe are most important.
Rule 1: talk to the person and not to the wound.
Rule 2: allow wounded soldiers to do what they can do themselves.
Rule 3: forget your moral questions about the war. Morality is for those who support the war and for those who oppose the war, not for those in the war.
Rule 4: don't assume this is a sad time for these recuperating men. For most their physical pain is receding or is being managed by drugs, and the true mental anguish has yet to sink in. They are focused on their future which after a close call with death looks darn rosy.