That's Algore Jr. in Vee-et Nahm! In fact this photo was on Goron's Campaign 2000 website. It was a much clearer copy than this one. In it you can really see how spotless and new all of his equipment is from his uniform to his pack. I guess everybody started out clean and new when they first got there but it sure stands out to me in comparison with most pics of soldiers in VN that I've seen.
Most people pick on the fact that Woodman Gore appears to be aiming his M-16 at his head. (Not sure I can imagine an excuse for the way he's handling that firearm mind you.) But that's not the real funny thing about the pic. Here's a hint: He's in no danger of shooting himself. No apparent danger anyway.
You never know what's in the chamber unless you just cleared it.