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Iranian presidential candidate Hasan Rowhani waves to his supporters during his speech in a campaign rally, Oroumieh, Iran, June 10, 2013.

A supporter of Iranian presidential candidate Mohsen Rezaei holds a banner during a campaign rally, Tehran, Iran, June 10, 2013.

Pro-reform Iranian presidential candidate Mohammad Reza Aref waves to his supporters at a rally one day before dropping out of the race, Tehran, Iran, June 10, 2013.

Supporters of the Iranian presidential candidate Saeed Jalili, shown in the posters, chant slogans, Tehran, Iran, June 9, 2013.

Supporters of Iranian presidential candidate Mohammad Bagher Qalibaf, who is also Tehran's mayor, chant during a street campaign, Tehran, Iran, June 9, 2013.

Supporters of presidential candidates Ali Akbar Velayati, shown in the poster at right, and Saeed Jalili, center on the poster, attend a street campaign after Friday prayers, Tehran, Iran, June 7, 2013.

A woman looks out of the window of a public bus as supporters of presidential candidates attend a street campaign, reflected at the window after Friday prayers in Tehran, Iran, June 7, 2013.

This photo released by the Islamic Republic of Iran Broadcasting shows presidential candidates taking part in a televised debate, Tehran, iran, June 7, 2013.