an era of sorrow coming to an end. there was a rather public outpouring of joy on the part of young iranians, hopeful f the prospect of change in their country, not because he was a liberal, he was the only moderate in a pool of six ultra conservative candidates, all vetted and approved to run by iran's guardian council. he said he wants better relations for the world and relief for the economy. the main reason for iran's isolation is nuclear defiancdef. he says the centrifuges will keep spinning. there's a willingness to be flexible, but not clear where he will give. >> of course, the nuclear programs are totally transparent in nature, but we are ready to show more transparency and show the world that iran's nuclear work complies fully with international framework. >> reporter: he knows the nuclear program, he was their nuclear negotiator 2003 to 2005. >> he is a regime insider, he is