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A combo of recent file pictures shows Iran's supreme leader Ayatollah Ali Khamenei (L) addressing the faithful at the weekly Muslim Friday prayers at Tehran University on June 19, 2009 and newly elected president, Hassan Rouhani, attending a press conference in the Iranian capital on June 17, 2013. Khamenei, who wields ultimate authority in Iran, backed Rouhani's overtures to the West but criticised some aspects of a UN visit during which he held talks with US counterpart Barack Obama during a speech to military commanders and graduating cadets in the Iranian capital on October 5, 2013. AFP PHOTO/BEHROUZ MEHRI (Photo credit should read BEHROUZ MEHRI/AFP/Getty Images)

A combo of recent file pictures shows Iran's supreme leader Ayatollah Ali Khamenei (L) addressing the faithful at the weekly Muslim Friday prayers at Tehran University on June 19, 2009 and newly elected president, Hassan Rouhani, attending a press conference in the Iranian capital on June 17, 2013. Khamenei, who wields ultimate authority in Iran, backed Rouhani's overtures to the West but criticised some aspects of a UN visit during which he held talks with US counterpart Barack Obama during a speech to military commanders and graduating cadets in the Iranian capital on October 5, 2013.  AFP PHOTO/BEHROUZ MEHRI        (Photo credit should read BEHROUZ MEHRI/AFP/Getty Images)