That would be Final Salue by Jim Sheeler. The story and the photo, shot by Todd Heisler, each won Pulitzers. It's an amazing story.
http://www.amazon.com/Final-Salute-Story-Unfinished-Lives/dp/0143115456/ref=sr_1_1?ie=UTF8&qid=1347328695&sr=8-1&keywords=jim+sheeler