Iran would take more than four months to make 1050 kilograms of low-enriched uranium, the first step to make one bomb. It would then need more time to further enrich it to weapons-grade, which takes less time with more enrichment centrifuges. There is a much lower risk of proliferation today than in 2013. Previously, Iran had more than 7000 kilograms of low-enriched uranium and its break-out time was two to three months. This situation was ended by the Joint Comprehensive Plan of Action (JCPOA), but may return.