Newsweek has reached out to the U.S. State Department for comment. Why It Matters. The remarks are the first time Tehran has commented on the content of the recent U.S. proposal,

The US has proposed a plan, which will allow Iran to continue enriching uranium in small amounts for civilian purposes while the two sides work on a bigger nuclear deal. The goal is to stop Iran from moving closer to making a nuclear weapon.

By Francois Murphy and John Irish VIENNA (Reuters) -U.N. inspectors monitoring Iran's Fordow nuclear site confronted a major gap in their knowledge last year as they watched trucks carrying advanced uranium-enriching centrifuges roll into the facility dug into a mountain south of Tehran.