In an effort to stop Iran from producing a nuclear bomb, the 25 leaders of the European Union on Friday offered the country possible economic and political incentives if it suspends its production of enriched uranium. As negotiations got under way, the Iranians were willing to consider a temporary suspension of perhaps six months in order to buy time for a broader agreement and avoid the threat of sanctions, what one European official calls "suspension minus." The goal of the Europeans, by contrast, has been to push Iran to agree to indefinitely suspend its uranium enrichment in exchange for the...