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At U.N., Iranian Leader Is Defiant on Nuclear Efforts

UNITED NATIONS, Sept. 25 -- Iranian President Mahmoud Ahmadinejad vowed Tuesday not to give in to pressure by "arrogant powers" trying to force him to abandon his nation's uranium-enrichment program and unilaterally declared that as far as he is concerned, "the nuclear issue of Iran is now closed."
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By Peter Baker and Robin Wright