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.

Iran has warned the U.S. that it will not give up its right to its enrich uranium, casting doubt on prospects for a deal as Tehran considers a U.S. proposal for curbing its nuclear program. Newsweek has reached out to the U.

President Donald Trump said Monday night his administration’s new Iran nuclear deal would not include any uranium enrichment, contradicting prior