The International Atomic Energy Agency reported to member states that Iran has begun operating one of three cascades of IR-6 centrifuges that it had recently installed at its underground Natanz site. Iran is feeding the cascade with uranium enriched to two percent purity and enriching it up to five percent. One of the two other cascades of IR-6 centrifuges at the site was undergoing passivation, a process that precedes enrichment. The other had yet to be fed with any nuclear material.