also richard marx is here. but first the top story, the escalating tension between the u.s. and iran. president obama warned tehran on friday to come clean or face the consequences. cbs news correspondent elizabeth palmer has the latest. >> reporter: this morning iran has actually hardened up its line on this newly disclosed site. it was under construction. they now say it's going to be put into operation. that's from the supreme leaders office which is squarely in line with the tone taken by iran's president. in new york iran's president, mahmoud ahmadinejad, was on the offensive. >> translator: this is not anything secretly, it just doesn't mean that we must inform h. inform mr. obama's administration of every facility that we have. >> reporter: but iran didn't tell the iaea the world's nuclear watch dog, until last monday. and only came clean then say western intelligence agencies because their secret had been discovered. it's time said president obama, for iran to start dealing in good faith. >> iran's leaders must now choose. they can live up to their responses and achi