These are called "contingency plans". They have them for every country in the world, and Antarctica. Most of them are dreamed up by Majors and below in brainstorming sessions not terribly dissimilar to the kinds of planning, etc. used by online action gamers. I'm quite sure that somewhere in the files there's a contingency plan for, e.g., nuking London, with ground zero(es) carefully plotted for maximum destructive effect. It wouldn't surprise me if there was one for New York city, just in case the Bad Guys (who?) should take it over. It does not surprise me in the least that there are contingency plans for bombing various places in the Middle East, with the ones we've been noticing lately being the most recently updated. [It's probably been a while since the plans for invasion of Argentina were looked at.]
Normally they don't get released. There was a time when they did once in a while, but in the modern hysterical atmosphere people always overreact. One of the worst bits of weaseling in the Freedom Of Information Act is the one that lets the military refuse to release such things.
This is a psyop aimed at Saddam and Prince Whatever of Saudi Arabia. Think of it as a line in an email header: Bcc: S. Hussein (via CNN)