CIA chief: Iran could enrich uranium to weapons-grade within weeks if it chooses
William Burns says US doesn't believe Iranian supreme leader has made decision to pursue weaponization, after Tehran found to have enriched uranium to 84% purity
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### Instruction: CIA chief: Iran could enrich uranium to weapons-grade within weeks if it chooses

### Response: William Burns says US doesn't believe Iranian supreme leader has made decision to pursue weaponization, after Tehran found to have enriched uranium to 84% purity