His cadre of Western-trained physicists then secretly used some of this material to fashion a relatively unsophisticated Hiroshima-style "gun-type" atomic device.

CENTERFORSECURITYPOLICY: Truth and Consequences for Saddam

"The Secretariat of the Agency received a letter from the Atomic Energy Organization of Iran (AEOI) dated 23 January 2013 informing the Agency that 'centrifuge machines type IR2m will be used in Unit A-22' at the Fuel Enrichment Plant (FEP) at Natanz, " the IAEA communication is reported to say.

BBC: Natanz uranium enrichment plant