Iran enriches uranium to highest purity yet as nuclear talks continue

United Nations — Iran has enriched uranium to a slightly higher purity than previously thought due to "fluctuations" in the technical process, the United Nations' atomic watchdog agency says in its latest report. The new report, still unpublished but obtained on Wednesday by CBS News, confirms that Iran is moving forward with its nuclear program as it engages in tense negotiations over a potential return to the 2015 nuclear deal.

The International Atomic Energy Agency said its analysis of a sample taken from an Iranian facility in mid-April, "shows an enrichment level consistent with that declared by Iran." Iranian officials announced in April that they'd taken another significant step toward obtaining weapons-grade uranium by enriching up to 60% purity. While that isn't technically weapons-grade (90% or above), having a stockpile of 60% enriched uranium could reduce the time Iran would need to make a bomb — something Tehran vehemently insists it doesn't want to do.