Country's atomic agency says it has provided 'explanations' about altered configuration of devices and the matter has been resolved

IAEA flags 'substantial' revision to links between IR-6 cascades enriching uranium to 60%; Tehran claims report based on flubbed data from inspectors that was since corrected

While previous intel assessments said Iran would need 2 years to assemble weapon, NYT finds growing gaps in West's knowledge of Tehran's progress, particularly at Fordo site

White House says 'all options available to the president' to stop development of nuclear weapon as UK, France and Germany vow to consult on how to respond to atomic escalation

Tehran also claims to build new centrifuges, says moves are retaliation for international resolution criticizing its lack of cooperation with UN nuclear agency

Tehran accuses UN atomic energy agency and Western countries of trying to exert 'maximum pressure' amid two months of nationwide protests in the Islamic Republic

Defense minister cites Israeli intelligence that uranium enrichment capabilities at Fordo site have tripled, calls on Security Council to prepare sanctions against Tehran

Rafael Grossi says project 'has grown enormously, far beyond what it was in 2015,' as Tehran creates new difficulties and negotiations remains stalled

IAEA chief Grossi says Iran using a special setup that allows it to swiftly switch between enrichment levels; Tehran reportedly has 43 kilograms of uranium enriched to 60% purity

New units allow Iranians to switch between uranium purity levels more easily, papers obtained by foreign media say, as negotiations to restore 2015 deal remain stuck