TEHRAN: The UN nuclear chief toured two Iranian uranium enrichment plants that have been the focus of Western concern on Friday (Nov 15) after Tehran said it was ready to address "doubts" about its ambitions. The visit to Iran by International Atomic Energy Agency director general Rafael Grossi comes after he warned "the margins for manoeuvre are beginning to shrink" over its nuclear programme. On Friday, Grossi visited the Natanz and Fordo enrichment plants in central Iran, the official IRNA