Ali Akbar Velayati, a top adviser to Iran’s supreme leader Ayatollah Ali Khamenei, is pictured here in 2013. In a video message, he said Iran is prepared to begin enriching uranium beyond limits set out by a 2015 nuclear deal.

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Ali Akbar Velayati, a top adviser to Iran’s supreme leader Ayatollah Ali Khamenei, is pictured here in 2013. In a video message, he said Iran is prepared to begin enriching uranium beyond limits set out by a 2015 nuclear deal.