Iranian Foreign Minister Mohammad Javad Zarif speaks during a recent news conference in Rome. Zarif told NPR that the U.S. has been hesitant and contradictory in its approach to dealing with the self-declared Islamic State. Fabio Campana/EPA/Landov hide caption

toggle caption Fabio Campana/EPA/Landov

Iran's Ali Akbar Salehi, who heads the country's Atomic Energy Organization, says four saboteurs have been arrested and are being interrogated. Alexander Klein/AFP/Getty Images hide caption

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