we saw tear gas fired into crowds of opposition demonstrators who were chanting "death to the dictator." and huge groups of security forces out in the streets, clearly intimidating anybody who tried to disagree with the government on this the 31st anniversary of the establishment of the islamic republic of iran. anderson? >> it's interesting to hear the official state media's reporting on it and to see other images. beyond the protests, though, what caught the attention of the white house was what the president ahmadinejad said about iran's nuclear program. what's the latest on that? >> he called one of the big achievements that he said that iran had accomplished becoming a nuclear nation. because for the first time it had developed 20% enriched uranium. what he said is necessary for scientific or medical needs. you need up to 90% for a weapon. already we're hearing from the white house, from the white house spokesman some doubts whether iran could really pull that off in just a few short days. let's listen to what the white house had to say.