Iran's president-elect Hassan Rouhani is due to be inaugurated on Sunday. <br /><br />He has promised different approaches in many of Iran’s problems from those of outgoing President Mahmoud Ahmadinejad. <br /><br />However, he faces enormous challenges. The disagreement over Iran’s nuclear program is Rouhani’s major international obstacle.<br /><br />The crumbling Iranian economy largely affected by crippling sanctions is the foremost internal problem.<br /><br />Al Jazeera’s Soraya Lennie reports from Tehran.
