Sergei Kirienko (L), head of Russia's nuclear energy organization, and his Iranian counterpart Gholamreza Aghazadeh listen to a question during a media conference at the nuclear power plant in Bushehr, 1200 kilometers (746 miles) south of Tehran February 25, 2009. Iran said on Wednesday it had carried out successful tests at its Russian-built Bushehr nuclear power plant in a step towards its launch. REUTERS/Caren Firouz (IRAN) 

Sergei Kirienko (L), head of Russia's nuclear energy organization and his Iranian counterpart Gholamreza Aghazadeh speak during a media conference at the nuclear power plant in Bushehr, 1200 kilometers (746 miles) south of Tehran February 25, 2009. Iran said on Wednesday it had carried out successful tests at its Russian-built Bushehr nuclear power plant in a step towards its launch. REUTERS/Caren Firouz (IRAN) 

Gholamreza Aghazadeh (R) head of Iran's nuclear energy organization listens as his Russian counterpart Sergei Kirienko speaks at the nuclear power plant in Bushehr, 1200 kilometers (746 miles) south of Tehran February 25, 2009. Iran said on Wednesday it had carried out successful tests at its Russian-built Bushehr nuclear power plant in a step towards its launch. REUTERS/Caren Firouz (IRAN) 

Sergei Kirienko (L), head of Russia's nuclear energy organization speaks with his Iranian counterpart Gholamreza Aghazadeh (R) during a tour of the nuclear power plant in Bushehr, 1200 kilometers (746 miles) south of Tehran February 25, 2009. Iran said on Wednesday it had carried out successful tests at its Russian-built Bushehr nuclear power plant in a step towards its launch. REUTERS/Caren Firouz (IRAN) 

Gholamreza Aghazadeh, head of Iran's atomic energy organisation speaks at the First International Conference on Nuclear Power Plants, Environment and Sustainable Development, in Tehran November 30, 2008. REUTERS/Morteza Nikoubazl (IRAN) 

Gholamreza Aghazadeh, head of Iran's atomic energy organisation speaks at the First International Conference on Nuclear Power Plants, Environment and Sustainable Development, in Tehran November 30, 2008. REUTERS/Morteza Nikoubazl (IRAN) 

Gholamreza Aghazadeh, head of Iran's atomic energy organisation (L) speaks with the Iranian Parliament Speaker Ali Larijani while attending the First International conference on Nuclear Power Plants, Environment and Sustainable Development, in Tehran November 30, 2008. REUTERS/Morteza Nikoubazl (IRAN) 

Gholamreza Aghazadeh, head of Iran's atomic energy organisation briefs the media after talks with International Atomic Energy Agency (IAEA) Director General Mohamed ElBaradei (not pictured) in Vienna July 24, 2008. Aghazadeh and ElBaradei met in Vienna's U.N. headquarters on Thursday to exchange views on the process of Iran's nuclear programme. REUTERS/Herwig Prammer (AUSTRIA) 

Gholamreza Aghazadeh, head of Iran's atomic energy organisation briefs the media after talks with International Atomic Energy Agency (IAEA) Director General Mohamed ElBaradei (not pictured) in Vienna July 24, 2008. Aghazadeh and ElBaradei met in Vienna's U.N. headquarters on Thursday to exchange views on the process of Iran's nuclear programme. REUTERS/Herwig Prammer (AUSTRIA) 

Gholamreza Aghazadeh, head of Iran's atomic energy organisation briefs the media after talks with International Atomic Energy Agency (IAEA) Director General Mohamed ElBaradei (not pictured) in Vienna July 24, 2008. Aghazadeh and ElBaradei met in Vienna's U.N. headquarters on Thursday to exchange views on the process of Iran's nuclear programme. REUTERS/Herwig Prammer (AUSTRIA) 

Gholamreza Aghazadeh, head of Iran's atomic energy organisation briefs the media after talks with International Atomic Energy Agency (IAEA) Director General Mohamed ElBaradei (not pictured) in Vienna July 24, 2008. Aghazadeh and ElBaradei met in Vienna's U.N. headquarters on Thursday to exchange views on the process of Iran's nuclear programme. REUTERS/Herwig Prammer (AUSTRIA) 

Gholamreza Aghazadeh, head of Iran's atomic energy organisation gestures during talks with International Atomic Energy Agency (IAEA) Director General Mohamed ElBaradei (not pictured) in Vienna July 24, 2008. Aghazadeh and ElBaradei met in Vienna's U.N. headquarters on Thursday to exchange views on the process of Iran's nuclear programme. REUTERS/Herwig Prammer (AUSTRIA) 

International Atomic Energy Agency (IAEA) Director General Mohamed ElBaradei (R) and Gholamreza Aghazadeh (L), head of Iran's atomic energy organisation hold talks in Vienna July 24, 2008. Aghazadeh and ElBaradei met in Vienna's U.N. headquarters on Thursday to exchange views on the process of Iran's nuclear programme. REUTERS/Herwig Prammer (AUSTRIA) 

International Atomic Energy Agency (IAEA) Director General Mohamed ElBaradei (L) and Gholamreza Aghazadeh (R), head of Iran's atomic energy organisation hold talks in Vienna July 24, 2008. Aghazadeh and ElBaradei met in Vienna's U.N. headquarters on Thursday to exchange views on the process of Iran's nuclear programme. REUTERS/Herwig Prammer (AUSTRIA) 

Valentin Sobolev (L), acting secretary of Russia's National Security Council, meets Gholamreza Aghazadeh (C), head of Iran's Atomic Energy Organisation, in Tehran April 28, 2008. Iran on Monday discussed with Russia proposals it has drawn up to defuse a nuclear row with the West, which accuses the Islamic Republic of seeking to build an atomic bomb. REUTERS/Caren Firouz (IRAN) 

The head of Iran's Atomic Energy Organisation, Gholamreza Aghazadeh, waits to welcome Valentin Sobolev, acting secretary of Russia's National Security Council, in Tehran April 28, 2008. Iran on Monday discussed with Russia proposals it has drawn up to defuse a nuclear row with the West, which accuses the Islamic Republic of seeking to build an atomic bomb. REUTERS/Caren Firouz (IRAN) 

Valentin Sobolev, acting secretary of Russia's National Security Council, listens as Gholamreza Aghazadeh, head of Iran's Atomic Energy Organisation, speaks during talks in Tehran April 28, 2008. Iran on Monday discussed with Russia proposals it has drawn up to defuse a nuclear row with the West, which accuses the Islamic Republic of seeking to build an atomic bomb. REUTERS/Caren Firouz (IRAN) 

The head of Iran's Atomic Energy Organisation, Gholamreza Aghazadeh (R), greets Valentin Sobolev, acting secretary of Russia's National Security Council, in Tehran April 28, 2008. REUTERS/Caren Firouz (IRAN) 

Iranian President Mahmoud Ahmadinejad (C) and atomic energy chief Gholamreza Aghazadeh (2nd R) attend an event to mark Iran's National Day of Nuclear Technology in Tehran April 8, 2008. Iran has begun installing 6,000 new centrifuges at its uranium enrichment plant, President Mahmoud Ahmadinejad said on Tuesday, defying the West which fears Tehran is trying to build nuclear bombs. REUTERS/Raheb Homavandi (IRAN) 

Iranian atomic energy chief Gholamreza Aghazadeh speaks as President Mahmoud Ahmadinejad listens during an event to mark Iran's National Day of Nuclear Technology in Tehran April 8, 2008. Iran has begun installing 6,000 new centrifuges at its uranium enrichment plant, President Mahmoud Ahmadinejad said on Tuesday, defying the West which fears Tehran is trying to build nuclear bombs. REUTERS/Raheb Homavandi (IRAN) 

Iranian President Mahmoud Ahmadinejad (2nd L) shakes hands with the IAEA deputy director Olli Heinonen as the International Atomic Energy Agency Director General Mohamed Elbaradei (L) and head of Iran's Atomic Energy Organization Gholamreza Aghazadeh attend an official meeting in Tehran January 12, 2008. REUTERS/Morteza Nikoubazl (IRAN) 

International Atomic Energy Agency (IAEA) Director General Mohamed ElBaradei (3rd R) speaks to journalists next to Iranian atomic energy chief Gholamreza Aghazadeh (R) at a news conference in Tehran January 11, 2008. REUTERS/Raheb Homavandi (IRAN) 

International Atomic Energy Agency (IAEA) Director General Mohamed ElBaradei (C) speaks with journalists next to Iranian atomic energy chief Gholamreza Aghazadeh (R) at a news conference in Tehran January 11, 2008. REUTERS/Raheb Homavandi (IRAN) 

Iranian atomic energy chief Gholamreza Aghazadeh attends a news conference in Tehran January 11, 2008. REUTERS/Raheb Homavandi (IRAN) 

Iranian atomic energy chief Gholamreza Aghazadeh speaks with journalists at a news conference in Tehran January 11, 2008. REUTERS/Raheb Homavandi (IRAN) 

Iranian atomic energy chief Gholamreza Aghazadeh (R) speaks with International Atomic Energy Agency (IAEA) Director General Mohamed ElBaradei (L) during a news conference in Tehran January 11, 2008. REUTERS/Raheb Homavandi (IRAN) 

The head of Iran's atomic energy organization Gholamreza Aghazadeh speaks during a ceremony at the Natanz nuclear enrichment facility 350 kilometers south of Tehran April 9, 2007. Iran announced on Monday it had begun industrial-scale nuclear fuel production in a fresh snub to the U.N. Security Council, which has imposed two rounds of sanctions on it for refusing to halt such work. REUTERS/Caren Firouz (IRAN) 

Russia's Head of the Federal Atomic Agency Sergei Kirienko smiles as he attends a meeting with his Iranian counterpart Gholamreza Aghazadeh in Tehran December 11, 2006. REUTERS/Morteza Nikoubazl (IRAN) 

Head of Iran's Atomic Energy Organisation Gholamreza Aghazadeh attends a meeting with his Russian counterpart Sergei Kirienko in Tehran December 11, 2006. REUTERS/Morteza Nikoubazl (IRAN) 

Head of Iran's Atomic Energy Organisation Gholamreza Aghazadeh attends an official meeting with his Russian counterpart Sergei Kirienko (not pictured) in Tehran December 11, 2006. REUTERS/Morteza Nikoubazl (IRAN) 

Russia's Head of the Federal Atomic Agency Sergei Kirienko looks on while attending a meeting with his Iranian counterpart Gholamreza Aghazadeh in Tehran December 11, 2006. REUTERS/Morteza Nikoubazl (IRAN) 

Secretary of Russia's Security Council Igor Ivanov (L), Head of Iran's Atomic Energy Organisation Gholamreza Aghazadeh (C) and Iranian Ambassador to Russia Gholamreza Ansari walk into Moscow's Kremlin after holding talks September 26, 2006. REUTERS/Ivan Sekretarev/Pool (RUSSIA) 

Secretary of Russia's Security Council Igor Ivanov smiles during talks with Head of Iran's Atomic Energy Organisation Gholamreza Aghazadeh, also a senior Iranian nuclear official, in Moscow September 26, 2006. REUTERS/Ivan Sekretarev/Pool (RUSSIA) 

Head of Iran's Atomic Energy Organisation Gholamreza Aghazadeh, also a senior Iranian nuclear official, smiles during talks with Secretary of Russia's Security Council Igor Ivanov in Moscow September 26, 2006. REUTERS/Ivan Sekretarev/Pool (RUSSIA) 

A senior Iranian nuclear official, the head of Iran's Atomic Energy Organisation Gholamreza Aghazadeh (C), and the head of Russia's atomic energy agency Sergei Kiriyenko (R) leave the hall after their negotiations in Moscow, September 25, 2006. Aghazadeh on Monday blamed Russian contractors for delays in building Iran's first nuclear power plant, saying they lacked the required "technical capabilities", a news agency reported. REUTERS/Sergei Karpukhin (RUSSIA) 

A senior Iranian nuclear official, the head of Iran's Atomic Energy Organisation Gholamreza Aghazadeh (L), and the head of Russia's atomic energy agency Sergei Kiriyenko (R) leave the hall after their negotiations in Moscow September 25, 2006. Aghazadeh on Monday blamed Russian contractors for delays in building Iran's first nuclear power plant, saying they lacked the required "technical capabilities", a news agency reported. REUTERS/Sergei Karpukhin (RUSSIA) 

A senior Iranian nuclear official, the head of Iran's Atomic Energy Organisation Gholamreza Aghazadeh (L), listens during his meeting with the head of Russia's atomic energy agency Sergei Kiriyenko in Moscow September 25, 2006. A senior Iranian nuclear official on Monday blamed Russian contractors for delays in building Iran's first nuclear power plant, saying they lacked the required "technical capabilities", a news agency reported. REUTERS/Sergei Karpukhin (RUSSIA) 

A senior Iranian nuclear official, the head of Iran's Atomic Energy Organisation Gholamreza Aghazadeh, listens during his meeting with the head of Russia's atomic energy agency Sergei Kiriyenko in Moscow, September 25, 2006. A senior Iranian nuclear official on Monday blamed Russian contractors for delays in building Iran's first nuclear power plant, saying they lacked the required "technical capabilities", a news agency reported. REUTERS/Sergei Karpukhin (RUSSIA) 

Iran's nuclear energy chief Gholamreza Aghazadeh leaves Vienna's U.N. headquarters April 26, 2006. Eleventh hour talks between International Atomic Energy Agency (IAEA) director Mohamed ElBaradei and Aghazadeh ended on Wednesday after 90 minutes without public comments from either side. REUTERS/Herwig Prammer 

The head of Russia's atomic nuclear agency Sergei Kiriyenko (R) and Gholamreza Aghazadeh, head of Iran's nuclear energy program speak to each other during a news conference in Bushehr, Iran February 26 2006. Iran has reached a "basic" agreement with Russia on jointly enriching uranium, officials said on Sunday -- but there was no immediate sign that it would suspend home-grown enrichment to allay fears that it is developing nuclear weapons. REUTERS/Raheb Homavandi 

Head of Russia's nuclear agency Sergei Kiriyenko (R) and head of Iran's nuclear energy program Gholamreza Aghazadeh speak to journalists in Bushehr, Iran February 26, 2006. REUTERS/Raheb Homavandi 

Head of head of Iran's nuclear energy program Gholamreza Aghazadeh speaks to journalists in Bushehr, Iran February 26, 2006. REUTERS/Raheb Homavandi 

The head of Russia's atomic nuclear agency Sergei Kiriyenko (R) and Gholamreza Aghazadeh, head of Iran's nuclear energy program speak to each other during a news conference in Bushehr, Iran February 26 2006. Iran has reached a "basic" agreement with Russia on jointly enriching uranium, officials said on Sunday -- but there was no immediate sign that it would suspend home-grown enrichment to allay fears that it is developing nuclear weapons. REUTERS/Raheb Homavandi 

Head of Russia's nuclear agency Sergei Kiriyenko (R) and head of Iran's nuclear energy program Gholamreza Aghazadeh speak to journalists in Bushehr, Iran February 26, 2006. REUTERS/Raheb Homavandi 

Head of head of Iran's nuclear energy program Gholamreza Aghazadeh speaks to journalists in Bushehr, Iran February 26, 2006. REUTERS/Raheb Homavandi 

Head of the Iranian Atomic Energy Organisation (IAEA) Gholamreza Aghazadeh (L) explains to Iran's President Mahmoud Ahmedinejad (C)about the enrichment facility during his visit of the Natanz uranium enrichment facility in Natanz, 350km (217 miles) south of the capital, Tehran, Iran February 15, 2006. Threatening to apply new U.S. sanctions, Washington accused Iran on Wednesday of defying the world by resuming uranium enrichment for nuclear fuel. REUTERS/Stringer 

Head of the Iranian Atomic Energy Organisation (IAEA) Gholamreza Aghazadeh (L) explains to Iran's President Mahmoud Ahmedinejad about the enrichment facility during his visit of the Natanz uranium enrichment facility in Natanz, 350km (217 miles) south of the capital, Tehran, Iran February 15, 2006. Threatening to apply new U.S. sanctions, Washington accused Iran on Wednesday of defying the world by resuming uranium enrichment for nuclear fuel. REUTERS/Stringer 

Iranian President Mahmoud Ahmadinejad (R) visits the Natanz uranium enrichment facility as the head of the Iranian Atomic Energy Organisation, Gholamreza Aghazadeh (L), stands near him in Natanz, 350km (217 miles) south of the capital Tehran, Iran February 15, 2006. REUTERS/Stringer PP06020210 

Head of the Iranian Atomic Energy Organisation (IAEA) Gholamreza Aghazadeh (L) explains to Iran's President Mahmoud Ahmedinejad (C)about the enrichment facility during his visit of the Natanz uranium enrichment facility in Natanz, 350km (217 miles) south of the capital, Tehran, Iran February 15, 2006. Threatening to apply new U.S. sanctions, Washington accused Iran on Wednesday of defying the world by resuming uranium enrichment for nuclear fuel. REUTERS/Stringer 

Head of the Iranian Atomic Energy Organisation (IAEA) Gholamreza Aghazadeh (L) explains to Iran's President Mahmoud Ahmedinejad about the enrichment facility during his visit of the Natanz uranium enrichment facility in Natanz, 350km (217 miles) south of the capital, Tehran, Iran February 15, 2006. Threatening to apply new U.S. sanctions, Washington accused Iran on Wednesday of defying the world by resuming uranium enrichment for nuclear fuel. REUTERS/Stringer 

Iranian President Mahmoud Ahmadinejad (R) visits the Natanz uranium enrichment facility as the head of the Iranian Atomic Energy Organisation, Gholamreza Aghazadeh (L), stands near him in Natanz, 350km (217 miles) south of the capital Tehran, Iran February 15, 2006. REUTERS/Stringer 

Iranian nuclear chief Gholamreza Aghazadeh speaks to journalists after an official meeting with the Secretary of Russia's Security Council Igor Ivanov in Tehran November 12, 2005. Iran on Saturday insisted upon its right to enrich its own uranium, rebuffing a proposal that Russia should perform the sensitive atomic fuel work to allay fears Tehran is seeking atomic arms. REUTERS/Morteza Nikoubazl 

Iranian nuclear chief Gholamreza Aghazadeh gestures during an official meeting with Igor Ivanov, Secretary of Russia's Security Council (unseen), in Tehran November 12, 2005. Iran on Saturday insisted upon its right to enrich its own uranium, rebuffing a proposal that Russia should perform the sensitive atomic fuel work to allay fears Tehran is seeking atomic arms. REUTERS/Morteza Nikoubazl 

Iranian Nuclear chief Gholamreza Aghazadeh (L) shakes hand with Igor Ivanov, the head of the Russian Security Council, before an official meeting in Tehran November 12, 2005. Iran on Saturday insisted upon its right to enrich its own uranium, rebuffing a proposal that Russia should perform the sensitive atomic fuel work to allay fears Tehran is seeking atomic arms. REUTERS/Morteza Nikoubazl 

Iranian nuclear chief Gholamreza Aghazadeh speaks to journalists after an official meeting with the Secretary of Russia's Security Council Igor Ivanov in Tehran November 12, 2005. Iran on Saturday insisted upon its right to enrich its own uranium, rebuffing a proposal that Russia should perform the sensitive atomic fuel work to allay fears Tehran is seeking atomic arms. REUTERS/Morteza Nikoubazl 

Secretary of Russia's Security Council Igor Ivanov enters a meeting room at the Iranian Atomic Energy Organisation building before an official meeting with Iranian nuclear chief Gholamreza Aghazadeh in Tehran November 12, 2005. Iran on Saturday insisted upon its right to enrich its own uranium, rebuffing a proposal that Russia should perform the sensitive atomic fuel work to allay fears Tehran is seeking atomic arms. REUTERS/Morteza Nikoubazl 

Secretary of Russia's Security Council Igor Ivanov attends an official meeting with Iranian nuclear chief Gholamreza Aghazadeh in Tehran November 12, 2005. Iran on Saturday insisted upon its right to enrich its own uranium, rebuffing a proposal that Russia should perform the sensitive atomic fuel work to allay fears Tehran is seeking atomic arms. REUTERS/Morteza Nikoubazl 

Secretary of Russia's Security Council Igor Ivanov sits under a picture of late Iranian leader Ayatollah Ruhollah Khomeini during an official meeting with Iranian nuclear chief Gholamreza Aghazadeh in Tehran November 12, 2005. Iran on Saturday insisted upon its right to enrich its own uranium, rebuffing a proposal that Russia should perform the sensitive atomic fuel work to allay fears Tehran is seeking atomic arms. REUTERS/Morteza Nikoubazl 

Iranian nuclear chief Gholamreza Aghazadeh (L) shakes hands with Igor Ivanov, Secretary of Russia's Security Council, before an official meeting in Tehran November 12, 2005. Iran on Saturday insisted upon its right to enrich its own uranium, rebuffing a proposal that Russia should perform the sensitive atomic fuel work to allay fears Tehran is seeking atomic arms. REUTERS/Morteza Nikoubazl 

Secretary of Russia's Security Council Igor Ivanov attends an official meeting with Iranian nuclear chief Gholamreza Aghazadeh in Tehran November 12, 2005. Iran on Saturday insisted upon its right to enrich its own uranium, rebuffing a proposal that Russia should perform the sensitive atomic fuel work to allay fears Tehran is seeking atomic arms. REUTERS/Morteza Nikoubazl