The Iranian opposition has just released a statement confirming British intelligence, i.e. that Iran has practiced taqiya in convincing the US that its nuclear program was halted in 2003:
An exiled Iranian opposition group on Tuesday contested a US intelligence report that said Teheran halted a nuclear weapons development program in 2003, insisting the bomb-making program resumed the following year.
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"We announce vehemently that the clerical regime is currently continuing its drive to obtain nuclear weapons," said Mohammad Mohaddessin, a spokesman for the Paris-based National Council of Resistance of Iran, or NCRI....
"The clerical regime leaks false information and intelligence to Western intelligence services, through double agents," he said.
Mohaddessin said Iran did shut down a Teheran weapons program center known as Lavizan-Shian in 2003 under international pressure and demolished the site. However, Mohaddessin claimed the Iranian authorities shifted their weapons program to other sites, which resumed the work in 2004.