Following a formal censure by the International Atomic Energy Agency (IAEA) Board of Governors over its nuclear program, Iran began feeding uranium into three new cascades of advanced IR-4 and IR-6 centrifuges at the Natanz enrichment facility. It also plans to install 18 more cascades of IR-2m centrifuges at Natanz and eight cascades of IR-6 centrifuges at Fordow.