Western nuclear analysts said yesterday that Tehran lacked the skills, materials and equipment to make good on its immediate nuclear ambitions, even as a senior Iranian official said Iran would defy international pressure and rapidly expand its ability to enrich uranium for fuel. The official, Muhammad Saeedi, the deputy head of Iran’s atomic energy organization, said Iran would push quickly to put 54,000 centrifuges on line — a vast increase from the 164 the Iranians said Tuesday that they had used to enrich uranium to levels that could fuel a nuclear reactor. Full Story