Iran's surprising decision to move warships off the Atlantic coast poses a potential catastrophic threat to America from a nuclear or electromagnetic pulse attack, according to an expert who foresaw Iran's move. Peter Pry, an expert on EMP attacks, said the ships are likely a dry run for a future attack, a maneuver meant to lull Washington into complacency while also embarrassing President Obama and his effort to convince Tehran to give up production of a nuclear bomb in return for a lifting of some economic sanctions. “Yes, patrols by the Iranian Navy off our coasts could pose threat of...