Iran’s top diplomat insisted Wednesday that Tehran will never stop enriching uranium, further underlining the Islamic Republic's red line in negotiations with the United States over its rapidly advancing nuclear program.

The US and Iran will resume nuclear talks in Rome on May 23, amid sharp disputes over uranium enrichment, with Iran refusing to halt enrichment and Washington yet to confirm attendance.

Iran says it will continue to negotiate with the U.S. on its nuclear program but will not retreat on enriched uranium plans despite President Trump's threats. Dan Raviv, the host of "The Mossad Files,