US Iran and P5+1 finalize JCPOA nuclear deal in Vienna after 20 months of negotiations

Iran and the P5+1 countries reach the Joint Comprehensive Plan of Action (JCPOA) in Vienna, ending 20 months of negotiations. Iran agrees to reduce its enriched uranium stockpile by 97% to 300 kg, limit enrichment to 3.67%, and allow expanded IAEA inspections for 15 years. In return, the US, EU, and UN lift nuclear-related sanctions and unfreeze over $100 billion in Iranian assets held abroad. Israeli Prime Minister Netanyahu denounces the deal. Saudi Arabia expresses concern. The IAEA formally verifies implementation in January 2016.