Why the US Started the Iran War

British officials explained that they were prepared to accept Iran's agreement as permanent thereafter, and were deeply impressed by the fact that there were no sunset clauses where sanctions would be lifted after a certain point, unlike the 2015 nuclear deal. Iran also agreed to convert 440kg of highly enriched uranium stockpiled in Iran under IAEA supervision into low-enriched uranium, and promised not to stockpile highly enriched uranium in the future. In the final round of talks, Iran agreed to suspend domestic uranium enrichment for 3 to 5 years, but the US demanded a 10-year suspension after consulting with President Trump in the afternoon session. In fact, Iran lost the means to enrich nuclear fuel domestically due to the 2025 bombing of enrichment facilities. Iran also made a proposal that mediators described as an economic jackpot, which included the US being given the opportunity to participate in Iran's future civilian nuclear program. In return, nearly 80% of economic sanctions against Iran were to be lifted, which also included the unfreezing of assets in Qatar that Iran had demanded in the 2025 talks.