Iranian President Mahmoud Ahmadinejad (R) kisses the hand of Supreme Leader Ayatollah Ali Khamenei (C) after receiving a certificate declaring him as president of the Islamic Republic as outgoing president Mohammad Khatami looks on in Tehran August 3, 2005. REUTERS/Raheb Homavandi/File Photo 

EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on their ability to film or take pictures in Tehran.

Satellite dishes which are smashed by Iran's police are left at a housing estate in Tehran June 4, 2011. Iran outlawed satellite dishes in the mid-1990s as part of efforts to curb what it considers Western cultural aggression, but the ban was largely ignored under President Mahmoud Ahmadinejad's predecessor Mohammad Khatami who tried to increase social freedoms after he was elected in 1997. However, hardliners have pressed for renewed restrictions after Ahmadinejad took office in 2005. REUTERS/Morteza Nikoubazl (IRAN - Tags: POLITICS CRIME LAW BUSINESS SCI TECH) 

EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on their ability to film or take pictures in Tehran.

Satellite dishes which are smashed by Iran's police are left at a housing estate in Tehran June 4, 2011. Iran outlawed satellite dishes in the mid-1990s as part of efforts to curb what it considers Western cultural aggression, but the ban was largely ignored under President Mahmoud Ahmadinejad's predecessor Mohammad Khatami who tried to increase social freedoms after he was elected in 1997. However, hardliners have pressed for renewed restrictions after Ahmadinejad took office in 2005. REUTERS/Morteza Nikoubazl (IRAN - Tags: POLITICS CRIME LAW BUSINESS SCI TECH) 

An Iranian with his glasses decorated with photos of President Mohammad Khatami carries national flag during celebration in central Tehran June 9, 2001, a day after country's presidential elections. As Iran's President Mohammad Khatami cruised towards re-election by a landslide on Saturday, supporters urged him to appoint a radical, reformist cabinet to overcome resistance to change by Islamic hardliners. REUTERS/Damir Sagolj (IRAN) BEST QUALITY AVAILABLE 

EDITORS' NOTE: Reuters and other foreign media are subject to Iranian restrictions on leaving the office to report, film or take pictures in Tehran.

A government supporter holds a poster with pictures of pro-reform cleric Mehdi Karroubi (L) and former President Mohammad Khatami with the sentence "Death to hypocrites" written across during a demonstration against opposition protests during the holy day of Ashura in Tehran December, 30 2009. REUTERS/Raheb Homavandi (IRAN - Tags: POLITICS CIVIL UNREST) 

Demonstrators crowd around leading reformist Mohammad Ali Abtahi (black head dress) during a rally in support of former Presidential candidate Mirhossein Mousavi in western Tehran June 15, 2009. On June 16, Abtahi was arrested, his office said. Picture taken June 15, 2009. REUTERS/Caren Firouz/Files (IRAN POLITICS ELECTIONS CONFLICT) 

Supporters of defeated presidential candidate Mirhossein Mousavi flash victory signs as one of them holds pictures of Mousavi (L) and former president Mohammad Khatami, during a rally in support of Mousavi, in Tehran June 15, 2009. REUTERS/Raheb Homavandi (IRAN POLITICS ELECTIONS) 

Iran's former president Mohammad Khatami casts his ballot during the presidential election, north of Tehran June 12, 2009.REUTERS/Chavosh Homavandi/jamejamonline (IRAN POLITICS ELECTIONS) 

Supporters of former Prime Minister Mirhossein Mousavi, who is a candidate for the upcoming presidential elections, stand in front of a picture of former president Mohammad Khatami during a pre-election gathering at a stadium in Tehran June 9, 2009. REUTERS/Damir Sagolj (IRAN POLITICS ELECTIONS) 

Supporters of former Prime Minister Mirhossein Mousavi, who is a candidate for the upcoming presidential elections stand in front of a poster of him and former president Mohammad Khatami (2nd L) during a pre-election gathering at a stadium in Tehran June 9, 2009. REUTERS/Damir Sagolj (IRAN POLITICS ELECTIONS) 

Supporters of Iran's presidential election candidate Mirhossein Mousavi carry posters with images of Mousavi (L) and former Iranian President Mohammad Khatami during a campaign rally in Tehran June 9, 2009. REUTERS/Ahmed Jadallah (IRAN POLITICS ELECTIONS) 

Supporters of Iran's presidential candidate Mirhossein Mousavi carry a poster with an image of Mousavi (L) and former Iranian President Mohammad Khatami during a campaign rally in Tehran June 9, 2009. REUTERS/Ahmed Jadallah (IRAN POLITICS ELECTIONS) 

A supporter of former prime minister and presidential election candidate Mirhossein Mousavi holds a campaign poster with pictures of Mousavi and former president Mohammad Khatami during the formation of a human chain from north to south Tehran June 8, 2009. REUTERS/Morteza Nikoubazl (IRAN POLITICS ELECTIONS) 

A youth supporter of Iran's presidential election candidate Mirhossein Mousavi stands in front of posters of Mousavi and former Iranian President Mohammad Khatami during a campaign rally in Tehran June 7, 2009. Iranians vote on June 12 in an election that pits hardline President Mahmoud Ahmadinejad against two moderate challengers and one fellow conservative. REUTERS/Ahmed Jadallah (IRAN POLITICS ELECTIONS) 

A supporter of Mirhossein Mousavi, a candidate in Iran's upcoming presidential election, distributes pictures of him and former Iranian President Mohammad Khatami (bottom) during a campaign rally in Tehran June 7, 2009. Iranians vote on June 12 in an election that pits hardline President Mahmoud Ahmadinejad against two moderate challengers and one fellow conservative. REUTERS/Ahmed Jadallah (IRAN POLITICS ELECTIONS) 

A supporter of Mirhossein Mousavi (L), a candidate in Iran's upcoming presidential election, distributes pictures of him and former Iranian President Mohammad Khatami during a campaign rally in Tehran June 7, 2009. Iranians vote on June 12 in an election that pits hardline President Mahmoud Ahmadinejad against two moderate challengers and one fellow conservative. REUTERS/Ahmed Jadallah (IRAN POLITICS ELECTIONS IMAGES OF THE DAY) 

Supporters of the former Prime Minister Mirhossein Mousavi hold his and a picture of the former president Mohammad Khatami (centre R) during a pre-election rally at the stadium in the city of Karaj, 50 km (31 miles) west of Tehran June 6, 2009. REUTERS/Damir Sagolj (IRAN POLITICS ELECTIONS IMAGES OF THE DAY) 

A supporter of the former Prime Minister Mirhossein Mousavi who is a candidate for the upcoming presidential elections rests by his and a picture of the former president Mohammad Khatami during a pre-election rally at the stadium in the city of Karaj, 50 km (31 miles) west of Tehran June 6, 2009. REUTERS/Damir Sagolj (IRAN POLITICS ELECTIONS) 

A supporter of the former Prime Minister Mirhossein Mousavi holds his and a picture of the former president Mohammad Khatami during a pre-election rally at the stadium in the city of Karaj, 50 km (31 miles) west of Tehran June 6, 2009. REUTERS/Damir Sagolj (IRAN POLITICS ELECTIONS) 

Women walk past a picture of presidential candidate Mir Hossein Mousavi (R) and former President Mohammad Khatami in Tehran May 26, 2009. Iranians vote on June 12 in an election that pits hardline President Mahmoud Ahmadinejad against two moderate challengers and one fellow-conservative. REUTERS/Raheb Homavandi (IRAN POLITICS ELECTIONS) 

Former Iranian President Mohammad Khatami (C) sits behind a national flag during an election campaign for Iran's former Prime Minister and upcoming presidential election candidate Mirhossein Mousavi at a stadium in Tehran, May 23, 2009. REUTERS/Morteza Nikoubazl (IRAN POLITICS ELECTIONS) 

Former Iranian President Mohammad Khatami (C) waves to his supporters during an election campaign for Iran's former Prime Minister and upcoming presidential election candidate Mirhossein Mousavi, at a 12,000-seat stadium in Tehran, May 23, 2009. REUTERS/Morteza Nikoubazl (IRAN POLITICS ELECTIONS IMAGES OF THE DAY) 

Former Iranian President Mohammad Khatami (top C) gestures to his supporters during an election campaign for Iran's former Prime Minister and upcoming presidential election candidate Mirhossein Mousavi, at a 12,000-seat stadium in Tehran, May 23, 2009. REUTERS/Morteza Nikoubazl (IRAN POLITICS ELECTIONS) 

A supporter holds an electoral poster with pictures of former Iranian President Mohammad Khatami (L) and former Prime Minister and Iran's upcoming presidential election candidate Mirhossein Mousavi as he stands at a shop in northern Tehran, May 22, 2009. REUTERS/Morteza Nikoubazl (IRAN POLITICS ELECTIONS) 

A supporter pastes an electoral poster with pictures of former Iranian President Mohammad Khatami (L) and former Prime Minister and Iran's upcoming presidential election candidate Mirhossein Mousavi on his backpack as he holds a green flag, the symbolic colour of Mousavi's campaign while standing at a bus station in northern Tehran, May 22, 2009. REUTERS/Morteza Nikoubazl (IRAN POLITICS ELECTIONS) 

A shopkeeper pastes an electoral poster with pictures of former Iranian President Mohammad Khatami (L) and former Prime Minister and Iran's upcoming presidential election candidate Mirhossein Mousavi on his shop window in northern Tehran, May 22, 2009. REUTERS/Morteza Nikoubazl (IRAN POLITICS ELECTIONS) 

An electoral poster with pictures of former Iranian President Mohammad Khatami (L) and former Prime Minister and Iran's upcoming presidential election candidate Mirhossein Mousavi is seen on a windshield of a car in northern Tehran, May 22, 2009. REUTERS/Morteza Nikoubazl (IRAN POLITICS ELECTIONS) 

Supporters hold pictures of former President Mohammad Khatami and former Iranian Prime Minister and reformist candidate for Iranian presidential elections Mirhossein Mousavi during a meeting in Tehran April 29, 2009. REUTERS/Raheb Homavandi (IRAN POLITICS ELECTIONS) 

Former Iranian President Mohammad Khatami waits to make a keynote speech to an audience at a university in Melbourne March 26, 2009. REUTERS/Mick Tsikas (AUSTRALIA POLITICS) 

Former Iranian President Mohammad Khatami makes a keynote speech to an audience at a university in Melbourne March 26, 2009. REUTERS/Mick Tsikas (AUSTRALIA POLITICS HEADSHOT) 

Former Iranian President Mohammad Khatami makes a keynote speech to an audience at a university in Melbourne March 26, 2009. REUTERS/Mick Tsikas (AUSTRALIA POLITICS HEADSHOT) 

Former Iranian President Mohammad Khatami makes a keynote speech to an audience at a university in Melbourne March 26, 2009.
REUTERS/Mick Tsikas (AUSTRALIA POLITICS HEADSHOT) 

Former Iranian President Mohammad Khatami speaks with Reuters correspondents in Tehran, in this January 22, 2008 file photo. Khatami withdrew from Iran's presidential election on Monday March 16, 2009, allies said, a move analysts say may boost President Mahmoud Ahmadinejad's re-election chances. Khatami, who served from 1997 to 2005, oversaw a thawing in Iran's ties with the West. Those relations have since sharply deteriorated under Ahmadinejad, who is expected to seek a second four-year term. Picture taken January 22, 2008. REUTERS/Caren Firouz/Files (IRAN POLITICS ELECTIONS) 

Former Iranian President Mohammad Khatami speaks with Reuters correspondents in Tehran January 22, 2008. Khatami has withdrawn his name as a candidate for the upcoming presidential election. Khatami, who served from 1997 to 2005, oversaw a thawing in Iran's ties with the West. Those relations have since sharply deteriorated under President Mahmoud Ahmadinejad, who is expected to seek a second four-year term. REUTERS/Caren Firouz/Files (IRAN POLITICS ELECTIONS) 

Former Iranian President Mohammad Khatami speaks with Reuters correspondents in this January 22, 2008 file photo in Tehran. Khatami has withdrawn his name as a candidate for the upcoming presidential election. Khatami, who served from 1997 to 2005, oversaw a thawing in Iran's ties with the West. Those relations have since sharply deteriorated under President Mahmoud Ahmadinejad, who is expected to seek a second four-year term. Picture taken January 22, 2008. REUTERS/Caren Firouz/Files (IRAN POLITICS ELECTIONS) 

Former Iranian President Mohammad Khatami walks during a ceremony to mark the anniversary of Iran's 1979 Islamic Revolution in Tehran's Azadi (Freedom) Square February 10, 2009. REUTERS/Caren Firouz (IRAN) 

Former Iranian President Mohammad Khatami (C) walks during a ceremony to mark the anniversary of Iran's 1979 Islamic Revolution in Tehran's Azadi (Freedom) Square February 10, 2009. REUTERS/Caren Firouz (IRAN) 

Iran's former President Mohammad Khatami walks during a ceremony to mark the anniversary of Iran's 1979 Islamic Revolution in Tehran's Azadi (Freedom) Square February 10, 2009. REUTERS/Caren Firouz (IRAN) 

A cleric rests as he listens to speeches by Former Iranian President Mohammad Khatami at a ceremony by a group of reformist clerics in Tehran, February 8, 2009. Khatami, who pushed for detente with the West when in office from 1997 to 2005, said on Sunday he would run in Iran's June presidential election. REUTERS/Morteza Nikoubazl (IRAN) 

Former Iranian President Mohammad Khatami (C) looks on as he attends a ceremony by a group of reformist clerics in Tehran, February 8, 2009. Khatami, who pushed for detente with the West when in office from 1997 to 2005, said on Sunday he would run in Iran's June presidential election. REUTERS/Morteza Nikoubazl (IRAN) 

Former Iranian President Mohammad Khatami looks on as he attends a ceremony by a group of reformist clerics in Tehran, February 8, 2009. Khatami, who pushed for detente with the West when in office from 1997 to 2005, said on Sunday he would run in Iran's June presidential election. REUTERS/Morteza Nikoubazl (IRAN) 

Former Iranian President Mohammad Khatami (2nd L) speaks with Mohammad Bojnourdi as they attend a ceremony by a group of reformist clerics in Tehran, February 8, 2009. Khatami, who pushed for detente with the West when in office from 1997 to 2005, said on Sunday he would run in Iran's June presidential election. REUTERS/Morteza Nikoubazl (IRAN) 

Former Iranian President Mohammad Khatami (C) and reformist clerics (L to R) Aliakbar Ashtiani, Mohammad Bojnourdi, Mousavi Khoini, Mohammadali Abtahi and Majid Ansari pose for a photograph in Tehran, February 8, 2009. Khatami, who pushed for detente with the West when in office from 1997 to 2005, said on Sunday he would run in Iran's June presidential election. REUTERS/Morteza Nikoubazl (IRAN) 

Former Iranian President Mohammad Khatami leaves a podium after speaking at a ceremony by a group of reformist clerics in Tehran, February 8, 2009. Khatami, who pushed for detente with the West when in office from 1997 to 2005, said on Sunday he would run in Iran's June presidential election. REUTERS/Morteza Nikoubazl (IRAN) 

Former Iranian President Mohammad Khatami is seen through a window after speaking at a ceremony by a group of reformist clerics in Tehran, February 8, 2009. Khatami, who pushed for detente with the West when in office from 1997 to 2005, said on Sunday he would run in Iran's June presidential election. REUTERS/Morteza Nikoubazl (IRAN) 

Former Iranian President Mohammad Khatami looks on as he attends a ceremony by a group of reformist clerics in Tehran, February 8, 2009. Khatami, who pushed for detente with the West when in office from 1997 to 2005, said on Sunday he would run in Iran's June presidential election. REUTERS/Morteza Nikoubazl (IRAN) 

Former Iranian President Mohammad Khatami looks on as he attends a ceremony by a group of reformist clerics in Tehran, February 8, 2009. Khatami, who pushed for detente with the West when in office from 1997 to 2005, said on Sunday he would run in Iran's June presidential election. REUTERS/Morteza Nikoubazl (IRAN) 

Former Iranian President Mohammad Khatami arrives at a ceremony by a group of reformist clerics in Tehran, February 8, 2009. Khatami, who pushed for detente with the West when in office from 1997 to 2005, said on Sunday he would run in Iran's June presidential election. REUTERS/Morteza Nikoubazl (IRAN) 

Former Iranian President Mohammad Khatami speaks with Reuters correspondents in Tehran in this January 22, 2008 file photo. Khatami, who won presidential elections in 1997 and 2001 with landslides, gave the strongest signal yet on Monday that he was considering running in this year's race for the Iranian presidency. REUTERS/Caren Firouz/Files (IRAN) 

Former Iranian President Mohammad Khatami speaks with Reuters correspondents in Tehran in this January 22, 2008 file photo. Khatami, who won presidential elections in 1997 and 2001 with landslides, gave the strongest signal yet on Monday that he was considering running in this year's race for the Iranian presidency. REUTERS/Caren Firouz/Files (IRAN) 

Former Iranian President Mohammad Khatami speaks with Reuters correspondents in Tehran in this January 22, 2008 file photo. Khatami, who won presidential elections in 1997 and 2001 with landslides, gave the strongest signal yet on Monday that he was considering running in this year's race for the Iranian presidency. REUTERS/Caren Firouz/Files (IRAN) 

Former Iranian President Mohammad Khatami (R) speaks with Seyyed Yasser Khomeini, grandson of the founder of the Islamic Republic Ayatollah Ruhollah Khomeini, during the annual congress of the Islamic Iran Participation Front in Tehran December 4, 2008. REUTERS/Caren Firouz (IRAN) 

Former Iranian President Mohammad Khatami (L) gives a certificate of appreciation to leading reformist politician Saeed Hajjarian during the annual congress of the Islamic Iran Participation Front in Tehran December 4, 2008. REUTERS/Caren Firouz (IRAN) 

Former Iranian President Mohammad Khatami attends the annual congress of the Islamic Iran Participation Front in Tehran December 4, 2008. REUTERS/Caren Firouz (IRAN) 

Former Italian Prime Minister Romano Prodi waves after speaking at a ceremony to commemorate the work of former Iranian President Mohammad Khatami in Yazd,700 km (435 miles) south of Tehran, October 15, 2008. REUTERS/Caren Firouz (IRAN) 

Former Italian Prime Minister Romano Prodi pushes up his glasses as he speaks at a ceremony to commemorate the work of former Iranian President Mohammad Khatami in Yazd, 700 km (435 miles) south of Tehran, October 15, 2008. REUTERS/Caren Firouz (IRAN) 

Bishop John Bryson Chane from the Diocese of Washington walks outside the main mosque in Yazd, 700 km (435 miles) south of Tehran, October 15, 2008. Former world Various leaders are in Yazd to attend the glorification ceremony for former Iranian President Mohammad Khatami. REUTERS/Caren Firouz (IRAN) 

Bishop John Bryson Chane from the Diocese of Washington steps out of the door of a room at a traditional hotel in Yazd, 700 km (435 miles) south of Tehran, October 15, 2008. Former world leaders are in Yazd to attend the glorification ceremony for former Iranian President Mohammad Khatami. REUTERS/Caren Firouz (IRAN) 

Former Italian Prime Minister Romano Prodi (R) speaks with former French Prime Minister Lionel Jospin at a traditional hotel in Yazd, 700 km (435 miles) south of Tehran, October 15, 2008. Former leaders are in Yazd to attend the glorification ceremony for former Iranian President Mohammad Khatami. REUTERS/Caren Firouz (IRAN)