WSJ reports that Iranian intelligence secured internal documents from UN nuclear watchdog allowing Tehran to evade inspections; details uncovered in archive Israel seized from Iran

Under 2015 deal, Tehran agreed to modify site so that it could not produce military-grade plutonium

Iranian nuclear agency says 'cold test' will be held to check fluid and support systems startup ahead of plant's full commissioning later in the year

In message marking country's national nuclear day, Ali Akbar Salehi also touts efforts to construct 2 new reactors at Bushehr plant

Operating secondary heat transfer circuit doesn't violate 2015 nuclear deal, but it is a step closer to producing weapons-grade material

Milestone brings site closer to reopening and producing heavy water, a key ingredient in the production of plutonium, which fuels nuclear weapons

Sources say allowing Russian, Chinese and European companies to work at Arak and Fordow facilities will aid non-proliferation efforts

Assistant to head of Iranian atomic energy program claims country produces 20 tons of heavy water a year, is self-sufficient in designing and producing centrifuges

As Iranians breach nuclear deal in protest of US sanctions, British embassy says 'we are upholding our obligations to cooperate' with Tehran on modernizing Arak facility

Invitation reportedly extended with US president's blessing; Iranian diplomat said to have expressed concerns any meeting would be little more than a photo op, New Yorker says