One of the first things the Marines did in Fallujah was to take the two bridges across the river - one of which was the imfamous bridge where the dead bodies of two American contractors were strung up.
This Marine knew that, and so he's written a message there, which you can see at this link, a watermarked Getty image that I won't steal for here:
http://editorial.gettyimages.com/sou...x?iid=51739842
"This is for the Americans of Blackwater that were murdered here in 2004, Semper Fidelis 3/5"
And under that
"P.S. Fuck You"
(The 3/5 is because he's in the 3/5 Lima Company of the Marines.)
But in the above image he's blacked over the "PS Fuck You" and is posting another P.S., which you make out
here: "Dark Horse". I guess that's his nom de guerre.