evidence: Iran's stockpile of enriched uranium was also reduced by 98% to 300kg (660lbs), a figure that must not be exceeded until 2031. It must also keep the stockpile's level of enrichment at 3.67%. [...] Before July 2015, Iran had enough enriched uranium and centrifuges to create eight to 10 bombs, according to the then Obama administration. [...] By November 2021, Iran had amassed a stockpile of enriched uranium that was many times larger than permitted, including at least 17.7kg (39lb) of material enriched to 60% purity - just below the level needed for a bomb. It had also resumed enrichment activity at Fordo; installed more centrifuges, and of a more advanced type, than allowed; and taken steps in the production of enriched uranium metal, which is a key material in nuclear weapons.