Western nations are planning to table a resolution at an IAEA meeting that will find Iran in non-compliance with its so-called safeguards obligations for the first time in 20 years, a senior western diplomat said.

Iran is escalating its fight with the United Nations nuclear watchdog by accusing its inspectors of slander and presenting sloppy evidence, according to a legal brief compiled by the Islamic Republic and circulated among diplomats days before a key meeting in Vienna.

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.

Behnam Ben Taleblu, senior director of the Iran program at the FDD, joined"Forbes Newsroom" to discuss a potential nuclear deal between the United States and Iran.

Iran has dramatically increased its stockpile of uranium needed to create nuclear weapons and has fallen short of compliance with international regulators, according to an IAEA report.