Over the years, the United States has shown considerable ingenuity in its effort to slow Iran ’s production of nuclear fuel: It has used sabotage, cyberattacks and creative economic sanctions. Now, mixing face-saving diplomacy and innovative technology, negotiators are attempting a new approach, suggesting that the Iranians call in a plumber. The idea is to convince the Iranians to take away many of the pipes that connect their nuclear centrifuges, the giant machines that are connected together in a maze that allows uranium fuel to move from one machine to another, getting enriched along the way. That way, the Iranians could claim they have not given in to Western demands that they eliminate all but a token number of their 19,000 machines, in which Iran has invested billions of dollars and tremendous national pride. And if the plumbing is removed, experts at America’s national nuclear laboratories have told the […]