"Chief Iranian Nuclear Affairs Negotiator Hosein Musavian: The Negotiations with Europe Bought Us Time to Complete the Esfahan UCF Project and the Work on the Centrifuges in Natanz." MEMRI
In this interview the chief Iranian Negotiator in the matter of their nuclear program explains that the protracted process of dealing with the IAEA and the European powers was worthwhile because it enabled Iran to procrastinate in dealing with the West long enough to complete major installation essential to the nuclear program.
Musavian makes it clear that the Iranian government’s negotiating strategy was motivated entirely by the tactical necessities required by the determination of the Iranian government to drive the program forward as rapidly as possible.
This interview should largely answer the uncertainty on the part of some people as to whether or not the Iranians could be lured into giving up their nuclear ambitions.