Recent U.S. and Israeli strikes in 2025 damaged Iran's key enrichment sites at Natanz, Fordow, and Isfahan, leaving much of its near-weapons-grade uranium stockpile inaccessible under rubble and halting verifiable progress. The IAEA's September 2026 referral of Iran to the UN Security Council over denied inspector access and unresolved safeguards issues has intensified diplomatic pressure, while satellite imagery shows only limited construction at sites like Pickaxe Mountain without confirmed enrichment resumption. Traders see these barriers, combined with Iran's ongoing NPT obligations and external monitoring, as making a completed nuclear weapon by December 2026 highly improbable. Late diplomatic breakthroughs or undetected recovery of fissile material could still shift timelines, though both face significant technical and political hurdles in the remaining months.