Protesters take to the streets of central Tehran, defying a ban on public demonstrations. (AFP/Getty Images)
Protesters marched in support of opposition leader Mir-Hossein Mousavi, who was defeated by President Mahmoud Ahmadinejad in disputed elections last month. (AFP / Getty Images)
President Mahmoud Ahmadinejad, seen here at a judiciary summit in Tehran, criticized Obama for making “unconventional, abnormal and discourteous comments” in condemning the violence and political repression. (Arash Khamooshi / AFP / Getty Images)
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A supporter of presidential contender Mir-Hossein Mousavi walks past a structure set aflame by protesters during clashes with police in Tehran on June 20, 2009. (Ali Safari / AFP/Getty Images)
Protesters cover their face against tear gas during clashes with riot police in Tehran. Thousands of Iranians clashed with police as they defied a warning Friday from supreme leader Ayatollah Ali Khamenei to end protests over last week’s disputed presidential election that saw President Mahmoud Ahmadinejad reelected. (Ali Safari / AFP/Getty Images)
A protester stands next to a burning bus during clashes with Iranian police in Tehran. Deputy police chief Ahmad Reza Radan announced that as of today, no form of illegal gathering to protest against the election results should take place.” (Ali Safari / AFP/Getty Images)
Following an official ban on foreign media outlets covering demonstrations in Iran, the European PressPhoto Agency obtained this image from Demotix showing Iranians, supporters of Mousavi running for cover from tear gas in Tehran. (Tehran reporter / EPA)
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Iranian men pray after listening to the Friday prayer sermon, delivered by the Islamic republic’s supreme leader Ayatollah Ali Khamenei. (Oliver Laban-Mattei / AFP / Getty Images)
An Iranian woman wearing a banner with images depicting Iranian President Mahmoud Ahmadinejad takes part in a rally after a Friday prayer ceremony in Tehran. (Abedin Taherkenareh / EPA)
Iranian family supporting defeated presidential candidate Mir-Hossein Mousavi holding his portrait as they ride on a motorcycle during a rally in Tehran. (AFP / Getty Images)
Iranian supporters of presidential candidate Mir-Hossein Mousavi holding his portrait and chanting slogans as they rally in Tehran. (AFP / Getty Images)
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Protesters watch a burning car next to a pro-government militia base in Tehran. (Vahid Salemi / Associated Press)
A protester allegedly injured by gunfire from pro-government militia is aided near a rally supporting leading opposition presidential candidate Mir Hossein Mousavi in Tehran. (Vahid Salemi / Associated Press)
Supporters of presidental candidate Mir Hossein Mousavi fill Azadi Square in Tehran. (Ben Curtis / Associated Press)
Defeated candidate Mousavi raises his arms as he attends an opposition rally. (Behrouz Mehri / AFP / Getty Images)
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The death of a demonstrator spurred more tense protests. Smoke billows from a car burned after news of the slaying. (AFP / Getty Images)
A sign sits on the ground next to a painted hand of a demonstrator during a rally by Iranian students over the results of their home country’s disputed election outside the United Nations office in Kuala Lumpur, Malaysia. (Mark Baker / Associated Press)
Supporters of reformist presidential candidate Mir Hossein Mousavi carry his poster during a rally in Azadi street in Tehran. Hundreds of thousands of supporters of the reformist presidential candidate attend a silent rally against newly elected hard line President Mahmoud Ahmadinejad. (Kamran Jebreili / Associated Press)
Iranian supporters of presidential candidate Mir Hossein Mousavi attend a protest near the Iranian embassy in Ankara, Turkey. (Burhan Ozbilici / Associated Press)
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Hundreds of thousands of supporters of opposition leader Mir-Hossein Moussavi march in the streets of Iran’s capital during a protest against alleged fraud in the recent presidential election despite a ban by the Interior Ministry. (Abedin Taherkenareh / EPA)
Native-born Iranian protesters stage a demonstration outside the U.N. building in Kuala Lumpur, Malaysia, to protest against the election results in Iran. (Ahmad Yusni / EPA)
Iranian demonstrators flee from riot police during clashes Saturday in Tehran. Violent clashes occurred throughout the capital after opposition leader Mir-Hossein Mousavi accused the government of fraud in the presidential election in which incumbent President Mahmoud Ahmadinejad was declared the winner. (Abedin Taherkenareh / EPA)
Iranian demonstrators take down street barriers during protests in Tehran. (Abedin Taherkenareh / EPA)
A cleric departs after casting his ballot at the Masoumeh shrine in the Iranian city of Qom, where droves of voters waited their turn. (Kamran Jebreili / Associated Press)
Iran’s conservative parliament speaker, Ali Larijani, third from left, arrives to cast his vote at the Masoumeh shrine in the city of Qom, south of Tehran. (Kamran Jebreili / Associated Press)
Iranians wait in line to vote at the Masoumeh shrine in the city of Qom. The election follows a hotly contested campaign pitting incumbent President Mahmoud Ahmadinejad against leading challenger and reformist candidate Mir-Hossein Mousavi, among others. (Kamran Jebreili / Associated Press)
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A supporter of Iranian President Mahmoud Ahmadinejad chants slogans at a rally in west Tehran. (Kamran Jebreili / Associated Press)
Iranians show their support for reformist candidate Mir-Hossein Mousavi in west Tehran. Mousavi is running against hard-line incumbent Mahmoud Ahmadinejad and other candidates in Friday’s presidential election. (Kamran Jebreili / Associated Press)
A supporter of Iranian President Mahmoud Ahmadinejad displays her hand, painted to resemble the Iranian flag, at an election rally. (Ben Curtis / Associated Press)
A supporter displays a picture of Iranian presidential candidate Mir-Hossein Mousavi. (Majid / Getty Images)
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A supporter displays an image of President Mahmoud Ahmadinejad in Tehran. Powerful reformists and conservatives within Iran’s elite have joined forces in an effort to unseat Ahmadinejad, whose populist economic policies and confrontational stance toward the West have been a source of concern. (Kamran Jebreili / Associated Press)
Supporters of presidential candidate Mir-Hossein Mousavi gather in Tehran. Mousavi’s wife, scholar and artist Zahra Rahnavard, has electrified female voters with her impressive resume and seemingly modern relationship with her husband. (Majid / Getty Images)
Supporters bearing Iranian flag colors cheer during a rally for President Mahmoud Ahmadinejad, who is seeking a second term. (Ben Curtis / Associated Press)
A man wearing a green headband -- the color of presidential candidate Mir-Hossein Mousavi’s party -- flashes a victory sign at a nighttime rally in Tehran. Such rallies are more like a street party, with Farsi hip-hop and techno music blaring from car speakers and young men and women dancing in the streets, but there is a serious undertone to them. (Ben Curtis / Associated Press)
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Supporters of Iranian President Mahmoud Ahmadinejad, carrying his portrait, leave at the end of an electoral campaign rally in Tehran. Iran expects a record number of voters to cast their ballots in this week’s presidential election, according to the head of the country’s electoral committee. Four candidates are in the race for the presidency, including Ahmadinejad, who is seeking a second four-year term. (Atta Nenare / AFP / Getty Images)
A supporter of Iranian President Mahmoud Ahmadinejad shouts slogans during an election rally in Tehran. According to the latest opinion polls, Ahmadinejad is still leading but his main challenger, Mir-Hossein Moussavi, also has reportedly caught up. Either Ahmadinejad or Moussavi needs to gain a majority in the June 12 election, otherwise the two would go to the second round to be held June 19. (Abedin Taherkenareh / EPA)
A young supporter of main challenger and reformist candidate Mir Hossein Mousavi shouts slogans as he dances to Farsi hip-hop music in the streets at a nighttime street rally just days before the elections in the Sadatabad district of northern Tehran. (Ben Curtis / Associated Press)
Reformist presidential candidate Mehdi Karroubi, center in white turban, waves to well-wishers. (Vahid Salemi / Associated Press)
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A campaign poster for Mir-Hossein Mousavi is studied by publisher Mahmodreza Bahmanpour, left, and a worker. (Hasan Sarbakhshian / Associated Press)
A supporter of Mir-Hossein Mousavi makes his feelings known at a Tuesday campaign rally in Tabriz, Iran. (Hasan Sarbakhshian / Associated Press)
A young man browses a political blog at an Internet cafe in Hamadan, Iran, on Tuesday. Candidates’ use of the Internet was curtailed recently when authorities blocked access to Facebook, where challengers had been rallying support. On Tuesday, access was restored. (Nima Daymari / AFP / Getty Images)
In Tehran on Tuesday, supporters of reformist candidate Mehdi Karroubi display ribbons bearing his name. (Behrouz Mehri / AFP / Getty Images)