So Why Not?

Iran's leadership confirmed to the NCF yesterday that the consortium deal is still on the table. This is a deal whereby Iran would place all nuclear enrichment in the hands of a Western consortium operating inside of Iran. What I can't understand is why the heck the West doesn't call their bluff?

IAEA chief urges Iran to cooperate with inspectors
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Khaleej Times - 28 January, 2012
The head of the UN’s atomic watchdog urged Iran to engage constructively with a team of inspectors heading to Tehran, after a damning report on Iran’s nuclear programme.
“The high-level team leaves today and starts work tomorrow,” International Atomic Energy Agency chief Yukiya Amano said at the Davos forum.
“We hope they will take a constructive approach. We hope that there will be substantial cooperation.”
An IAEA team led by chief inspector Herman Nackaerts and his number two, Rafael Grossi, was to head to Tehran later Friday.
In November the agency said it had evidence “Iran has carried out activities relevant to the development of a nuclear device”, a charge it denies.