Looks like we might have been subject to a bit of propaganda.

"The US Central Intelligence Agency (CIA) has not found conclusive evidence that Iran is developing nuclear weapons, a US magazine has reported. Veteran investigative reporter Seymour Hersh, writing in The New Yorker, cites a secret CIA report based on intelligence such as satellite images."
http://news.bbc.co.uk/2/hi/americas/6167304.stm