A single high-altiltude electromagnetic pulse from a nuclear detonation could do a lot of damage to the US. Launching it off the deck of an oil freighter along one of our coasts would make it hard to intercept and difficult to tell where it came from. The Iranians are just crazy enough to try a stunt like this knowing full well that MAD applies.
We have a missile defense network that would make that approach difficult.
More likely, and proven to already be a M.O., they would build the EMP here in the States from scratch. The delivery system? Well, that needs to be no more complex than a weather balloon....
"Our Constitution was made only for a moral and religious people. It is wholly inadequate to the government of any other." - John Adams
