Iran MOU Response Overdue on Day 71 — Araghchi Accuses US of 'Reckless Military Adventure'; Tehran Calls Terms 'Maximalist and Unacceptable'

Iran failed to deliver its formal response to the US MOU framework by the end of May 8 as Secretary Rubio had expected, extending the diplomatic impasse into Day 71 (May 9, 2026). Iranian FM Araghchi accused Washington of 'opting for a reckless military adventure every time a diplomatic solution is on the table,' in a pointed signal that Tehran viewed the overnight Hormuz clashes and US blockade enforcement as sabotaging diplomacy. Iran's semi-official Tasnim News Agency described the MOU text as containing 'unacceptable clauses,' calling it propaganda 'aimed at justifying Trump's retreat.' Pakistan, acting as mediator, expressed continued hope that a breakthrough was still possible 'soon.' Iranian officials were described as still 'reviewing' the MOU via Pakistani intermediaries, with no conclusion reached. Separately, Fox News published a report alleging satellite imagery revealed an Iranian nuclear weapons development facility dubbed the 'Rainbow Site' in Semnan province — a story Araghchi immediately rejected as 'Israeli-driven propaganda aimed at disrupting negotiations.' The report emerged at the most delicate juncture of the MOU talks, raising questions about whether it was an intelligence leak designed to harden the US negotiating position or torpedo the diplomatic track. The nuclear issue — specifically Iran's insistence on sovereignty over Hormuz sequencing versus the US refusal to 'pay a toll' — remained the fundamental gap in the MOU framework. The standoff marked the third consecutive day in which resolution appeared imminent yet yielded no formal agreement.