Iranian election staff, chat, in front of a portrait of the late revolutionary founder Ayatollah Khomeini, at the election headquarters of interior ministry, in Tehran, Iran, Tuesday, May 7, 2013. Iranian authorities opened the registration process Tuesday for candidates in next month's presidential election that will pick a successor to President Mahmoud Ahmadinejad and offer a critical test for reformists battered after years of crackdowns. (AP Photo/Vahid Salemi)

Associated Press
Iranian election staff, chat, in front of a portrait of the late revolutionary founder Ayatollah Khomeini, at the election headquarters of interior ministry, in Tehran, Iran, Tuesday, May 7, 2013. Iranian authorities opened the registration process Tuesday for candidates in next month's presidential election that will pick a successor to President Mahmoud Ahmadinejad and offer a critical test for reformists battered after years of crackdowns. (AP Photo/Vahid Salemi)
Iranian election staff, chat, in front of a portrait of the late revolutionary founder Ayatollah Khomeini, at the election headquarters of interior ministry, in Tehran, Iran, Tuesday, May 7, 2013. Iranian authorities opened the registration process Tuesday for candidates in next month's presidential election that will pick a successor to President Mahmoud Ahmadinejad and offer a critical test for reformists battered after years of crackdowns. (AP Photo/Vahid Salemi)
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