Nuclear talks with Iran have suffered a fresh setback, with Iran's Supreme Leader announcing he will not allow international inspectors access to Iranian military sites or scientists.
In comments to top military commanders, Ayatollah Ali Khamenei vowed to resist pressure from the U.S. and other world powers.
The move comes as nuclear negotiators from Iran and six world nations kicked off a fresh round of talks in Vienna.
Nina-Maria Potts reports:
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