Iran's announcement that it has enriched a minute amount of uranium has unleashed urgent calls for a preventive U.S. air strike by the same sources that earlier urged war on Iraq. If there is another terrorist attack in the United States, you can bet your bottom dollar that there will be also immediate charges that Iran was responsible in order to generate public hysteria in favor of military action. But there are four compelling reasons against a preventive air attack on Iranian nuclear facilities: 1. In the absence of an imminent threat (with the Iranians at least several years away...