How close is Iran to having a nuclear weapon? | The Economist

TL;DR

Iran holds 440kg of near-weapons-grade uranium with IAEA inspectors currently locked out, making its nuclear status deeply uncertain.

Key Points

• 1.Iran has 440kg of highly enriched uranium at near-weapons-grade levels. The IAEA tracked it precisely until inspections halted days before the 12-day war; its current status is unverified but presumed in place.
• 2.The IAEA cannot currently inspect Iran's nuclear material. Post-war negotiations to restore access have failed, leaving a dangerous accountability gap for material that could be diverted to a weapons program.
• 3.No evidence of a systematic, institutionalized nuclear weapons program was found, but the picture was murky. Traces of uranium at undisclosed sites and limited access created a complicated mosaic of concern for inspectors.
• 4.Iran's nuclear program cannot be fully destroyed by military strikes. Knowledge cannot be 'unlearned,' centrifuge technology has spread to workshops across many cities, and Iran rapidly upgraded from simple to ultra-centrifuges after the JCPOA collapsed.
• 5.The only viable solution is a robust inspection regime, but the latest war has made that harder. The IAEA director says the conflict added complexity to restoring access, while debating whether nuclear deterrence — as seen with North Korea — incentivizes Iran to cross the threshold.