After a quick google search, I found one pretty old and crappy site that let's you change the text on that kid's cardboard piece. Used it to make this :
This was made on :
Iraqi Sign Generator (Caption: Thumbs Up For The Americans) And Free Ecard
This one also came up with the same picture :
American Soldier In Iraq Sign Generator 2010! Personalize this message! Iraqi Sign Generator
And I'm sure there's a bunch of others.
