building trust through transparency. to international diplomats listening, that was a welcome change of tone, signaling future cooperation. but to the many hard-line members of iran's regime, it sounded like a threat. political analyst professor saddiq zabakalam says he will have to fight them first. >> reporter: he does, however, have the backing of millions of voters who want them to fix than's economy-- battered and sinking under the pressure of international sanctions. to get those international sanctions lifted, president rouhani is going to have to come