Saint Vincent and the Grenadines' Prime Minister Ralph Gonsalves (2nd L) walks with Iran's Vice President Parviz Davoudi (L) during an official welcoming ceremony in Tehran, April 27, 2009. REUTERS/Morteza Nikoubazl (IRAN POLITICS) 

Iran's Vice President Parviz Davoudi (2nd L) smiles as Saint Vincent and the Grenadines' Prime Minister Ralph Gonsalves (R) introduces officials during an official welcoming ceremony in Tehran, April 27, 2009. REUTERS/Morteza Nikoubazl (IRAN POLITICS) 

Iran's Vice President Parviz Davoudi (L) shakes hands with the Saint Vincent and the Grenadines' Prime Minister Ralph Gonsalves during an official welcoming ceremony in Tehran, April 27, 2009. REUTERS/Morteza Nikoubazl (IRAN POLITICS) 

Iran's Vice President Parviz Davoudi (L) talks to an employee as Total E&P Iran General Manager Gerard Rabier (R) watches during the 14th International Oil, Gas & Petrochemical Exhibition (IOGPE) in Tehran April 21, 2009. REUTERS/Morteza Nikoubazl (IRAN POLITICS ENERGY BUSINESS) 

Iran's Vice President Parviz Davoudi (R) reacts while speaking with Iranian Oil Minister Gholamhossein Nozari as they attend the 14th International Oil, Gas & Petrochemical Exhibition (IOGPE) in Tehran April 21, 2009. REUTERS/Morteza Nikoubazl (IRAN POLITICS ENERGY BUSINESS HEADSHOT) 

An employee of Iranian Petrochemical company speaks with Iran's Vice President Parviz Davoudi (C) as Iranian Oil Minister Gholamhossein Nozari (4th R) points at a model of a petrochemical complex during the 14th International Oil, Gas & Petrochemical Exhibition (IOGPE) in Tehran April 21, 2009. REUTERS/Morteza Nikoubazl (IRAN POLITICS ENERGY BUSINESS) 

Iraq's Prime Minister Nuri al-Maliki (L) and Iran's First Vice President Parviz Davoudi listen to the Iraqi anthem during a farewell ceremony at the International Mehrabad airport in Tehran January 4, 2009. REUTERS/Morteza Nikoubazl (IRAN) 

Iraq's Prime Minister Nuri al-Maliki (L) and Iran's First Vice President Parviz Davoudi listen to the Iraqi anthem during a farewell ceremony at the International Mehrabad airport in Tehran January 4, 2009. REUTERS/Morteza Nikoubazl (IRAN) 

Iraq's Prime Minister Nuri al-Maliki (R) walks with Iran's First Vice President Parviz Davoudi (L) during a welcoming ceremony at the International Mehrabad airport in Tehran January 3, 2009. REUTERS/Morteza Nikoubazl (IRAN) 

Iraq's Prime Minister Nuri al-Maliki (3rd L) walks with Iran's First Vice President Parviz Davoudi (L) during a welcoming ceremony at the International Mehrabad airport in Tehran January 3, 2009. REUTERS/Morteza Nikoubazl (IRAN) 

Algeria's President Abdelaziz Bouteflika (R) meets with Iran's First Vice-President Parviz Davoud at Presidential Palace in Algiers November 16, 2008. REUTERS/Stringer (ALGERIA) 

Russia's Prime Minister Vladimir Putin (L) meets Iran's First vice-president Parviz Davoudi in Astana, October 30, 2008. REUTERS/RIA Novosti/Pool/Alexei Druzhinin (KAZAKHSTAN) 

Iran's President Mahmoud Ahmadinejad (L) reacts as he speaks with Vice President Parviz Davoudi before a welcoming ceremony for his Syrian counterpart Bashar al-Assad in Tehran August 2, 2008. REUTERS/Morteza Nikoubazl (IRAN) 

Iraq's Prime Minister Nuri al-Maliki before an official meeting with Iran's Vice President Parviz Davoudi in Tehran June 8, 2008. REUTERS/Morteza Nikoubazl (IRAN) 

Iran's Foreign Minister Manouchehr Mottaki looks on as he attends an official meeting between Iraq's Prime Minister Nuri al-Maliki and Iran's Vice President Parviz Davoudi (unseen) in Tehran June 8, 2008. REUTERS/Morteza Nikoubazl (IRAN) 

Iran's Foreign Minister Manouchehr Mottaki smiles as he attends an official meeting between Iraq's Prime Minister Nuri al-Maliki and Iran's Vice President Parviz Davoudi (unseen) in Tehran June 8, 2008. REUTERS/Morteza Nikoubazl (IRAN) 

Iraq's Prime Minister Nuri al-Maliki (R) and Iran's Vice President Parviz Davoudi (L) walks at a presidential building before an official meeting in Tehran June 8, 2008. REUTERS/Morteza Nikoubazl (IRAN) 

Iraq's Prime Minister Nuri al-Maliki (R) shakes hands with Iran's Vice President Parviz Davoudi before an official meeting in Tehran June 8, 2008. REUTERS/Morteza Nikoubazl (IRAN) 

Iraq's Prime Minister Nuri al-Maliki (L) meet Iran's Vice President Parviz Davoudi (R) at an official meeting in Tehran June 8, 2008. REUTERS/Morteza Nikoubazl (IRAN) 

Iranian President Mahmoud Ahmadinejad jokes with journalists as he and first Vice President Parviz Davoudi (L) fill in their ballots for the parliamentary election at a mosque in south Tehran March 14, 2008. Iranians voted on Friday in a low-key election likely to keep parliament in the grip of conservatives after unelected state bodies barred many reformist foes of President Mahmoud Ahmadinejad from the race. REUTERS/Raheb Homavandi (IRAN) 

Syria's Vice President Farouq al Shara (R) meets his Iranian counterpart Parviz Davoudi in Damascus March 6, 2008. REUTERS/Khaled al-Hariri (SYRIA) 

Iranian Vice President Parviz Davoudi smiles upon his arrival to Damascus airport, March 5, 2008. Davoudi will hold discussions with Syrian officials on the latest developments in the region and the economic ties between the two countries. REUTERS/Khaled al-Hariri (SYRIA) 

Iranian Vice President Parviz Davoudi, review the Syrian honour guards at Damascus airport, March 5, 2008. REUTERS/Khaled al-Hariri (SYRIA) 

Syrian Prime Minister Naji al-Otri (L) and Iranian Vice President Parviz Davoudi, review the honour guards at Damascus airport, March 5, 2008. REUTERS/Khaled al-Hariri (SYRIA) 

Syrian Prime Minister Naji al-Otri (L) and Iranian Vice President Parviz Davoudi, review the honour guards at Damascus airport, March 5, 2008. REUTERS/Khaled al-Hariri (SYRIA) 

Syrian Prime Minister Naji al-Otri (L) welcomes Iranian Vice President Parviz Davoudi at Damascus airport March 5, 2008. REUTERS/Khaled al-Hariri (SYRIA) 

Iran's Vice President Parviz Davoudi (R) welcomes Iraq's Prime Minister Nuri al-Maliki during an arrival ceremony in Tehran August 8, 2007. REUTERS/Morteza Nikoubazl (IRAN) 

Iraq's Prime Minister Nuri al-Maliki (2nd R) and Iran's Vice President Parviz Davoudi inspect an honour guard during an arrival ceremony in Tehran August 8, 2007. REUTERS/Morteza Nikoubazl (IRAN) 

Iranian Vice President Parviz Davoudi speaks at the opening of the Oil Gas and Petrochemical exhibition in Tehran April 18, 2007. REUTERS/Caren Firouz (IRAN) 

Iranian Vice President Parviz Davoudi speaks to journalists at the nuclear power plant in Bushehr, about 1,215 km (755 miles) south of Tehran April 3, 2007. REUTERS/Raheb Homavandi (IRAN) 

Iran's Vice President Parviz Davoudi (R) meets his Iraqi counterpart Tareq al-Hashemi in Tehran March 11, 2007. REUTERS/Raheb Homavandi (IRAN) 

Iran's Vice President Parviz Davoudi (L) shakes hands with his Iraqi counterpart Tareq al-Hashemi in Tehran March 11, 2007. REUTERS/Raheb Homavandi (IRAN) 

Iran's Vice President Parviz Davoudi (L) welcomes his Iraqi counterpart Tareq al-Hashemi in Tehran March 11, 2007. REUTERS/Raheb Homavandi (IRAN) 

Syrian President Bashar al-Assad (R) and Iranian First Vice President Parviz Davoudi (L) look at an assembly line for Sham, the first car assembled in Syria, in the industrial city of Adra, near Damascus March 8, 2007. REUTERS Khaled al-Hariri (SYRIA) 

Syrian President Bashar al-Assad (R) stands next to Iranian First Vice President Parviz Davoudi as they look at an assembly line for Sham, the first car assembled in Syria, in the industrial city of Adra, near Damascus March 8, 2007. REUTERS Khaled al-Hariri (SYRIA) 

Iranian Vice President Parviz Davoudi (R) and Palestinian Prime Minister Ismail Haniyeh listen to Palestinian and Iranian national anthems during a ceremony in Tehran December 10, 2006. REUTERS/Suhaib Salem (IRAN) 

Palestinian Prime Minister Ismail Haniyeh waves after his meeting with Iranian Vice President Parviz Davoudi (rear, obscured) in Tehran December 10, 2006. REUTERS/Suhaib Salem (IRAN) 

Palestinian Prime Minister Ismail Haniyeh gestures after his meeting with Iranian Vice President Parviz Davoudi in Tehran December 10, 2006. REUTERS/Suhaib Salem (IRAN) 

Iranian Vice President Parviz Davoudi (R) walks with Palestinian Prime Minister Ismail Haniyeh during a ceremony in Tehran December 10, 2006. REUTERS/Suhaib Salem (IRAN) 

Iranian Vice President Parviz Davoudi (L) walks with Palestinian Prime Minister Ismail Haniyeh (2nd L) during a ceremony in Tehran December 10, 2006. REUTERS/Suhaib Salem (IRAN) 

Iranian Vice President Parviz Davoudi (R) welcomes Palestinian Prime Minister Ismail Haniyeh in Tehran December 7, 2006. Haniyeh arrived in Tehran on Thursday for talks with top officials in the Islamic state, a key financial backer of his Hamas government. REUTERS/Suhaib Salem (IRAN) 

Iranian Vice President Parviz Davoudi (L) welcomes Palestinian Prime Minister Ismail Haniyeh in Tehran December 7, 2006. Haniyeh arrived in Tehran on Thursday for talks with top officials in the Islamic state, a key financial backer of his Hamas government. REUTERS/Suhaib Salem (IRAN) 

Palestinian Prime Minister Ismail Haniyeh (L) and Iran's Vice-president Parviz Davoudi stand at attention while the national anthems are played during a welcoming ceremony in Tehran December 7, 2006. REUTERS/Raheb Homavandi (IRAN) 

Palestinian Prime Minister Ismail Haniyeh (L) speaks with Iran's Vice-president Parviz Davoudi (R) during during an official meeting in Tehran December 7, 2006. REUTERS/Raheb Homavandi (IRAN) 

Palestinian Prime Minister Ismail Haniyeh (C) shakes hands with Iranian Vice-president Parviz Davoudi during a welcome ceremony upon his arrival in Tehran December 7, 2006. REUTERS/Raheb Homavandi (IRAN) 

Palestinian Prime Minister Ismail Haniyeh (C) walks with Iranian Vice-president Parviz Davoudi during a welcome ceremony upon his arrival in Tehran December 7, 2006. REUTERS/Raheb Homavandi (IRAN) 

Palestinian Prime Minister Ismail Haniyeh (C) walks with Iranian Vice-president Parviz Davoudi (L) during a welcome ceremony upon his arrival in Tehran December 7, 2006. REUTERS/Raheb Homavandi (IRAN) 

Turkish Prime Minister Tayyip Erdogan (C) walks with Iranian Vice-president Parviz Davoudi (L) during a welcome ceremony upon his arrival in Tehran December 3, 2006. REUTERS/Morteza Nikoubazl (IRAN) 

Iranian Vice-president Parviz Davoudi speaks during a military parade to commemorate the start of the 1980-88 Iran-Iraq war, in Tehran September 22, 2006. REUTERS/Morteza Nikoubazl (IRAN) 

Iranian Vice-president Parviz Davoudi speaks during a military parade to commemorate the start of the 1980-88 Iran-Iraq war, in Tehran September 22, 2006. REUTERS/Morteza Nikoubazl (IRAN) 

Iranian Vice-president Parviz Davoudi (C), Joint Chief of Staff of Iran Armed Forces General Hassan Firoozabadi (L) and Iran's Army Commander Major General Ataollah Salehi attend a military parade to commemorate the start of the 1980-88 Iran-Iraq war, in Tehran September 22, 2006. REUTERS/Morteza Nikoubazl (IRAN) 

Pakistani President Pervez Musharraf (R) meets Iranian Vice President Parviz Davoudi (L) in Rawalpindi May 26, 2006. Iran has no desire for nuclear weapons but will not compromise on its right to develop nuclear technology to meet its energy needs, First Vice President Parviz Davoudi said in Pakistan on Thursday EDITORIAL USE ONLY REUTERS/Press Information Department/Handout 

Iranian Vice President Parviz Davoudi listens to a question during a news conference in Islamabad May 25, 2006. Iran has no desire for nuclear weapons but will not compromise on its right to develop nuclear technology to meet its energy needs, First Vice President Parviz Davoudi said in Pakistan on Thursday. REUTERS/Mian Khursheed 

Iranian Vice President Parviz Davoudi (L) and Pakistani Prime Minister Shaukat Aziz speaks during a news conference in Islamabad May 25, 2006. Iran has no desire for nuclear weapons but will not compromise on its right to develop nuclear technology to meet its energy needs, First Vice President Parviz Davoudi said in Pakistan on Thursday. REUTERS/Mian Khursheed 

Iranian Vice President Parviz Davoudi (L) speaks during a news conference with Pakistani Prime Minister Shaukat Aziz in Islamabad May 25, 2006. Iran has no desire for nuclear weapons but will not compromise on its right to develop nuclear technology to meet its energy needs, First Vice President Parviz Davoudi said in Pakistan on Thursday. REUTERS/Mian Khursheed 

Iranian Vice President Parviz Davoudi (L) talks with Pakistani Prime Minister Shaukat Aziz in Islamabad May 25, 2006. Iran has no desire for nuclear weapons but will not compromise on its right to develop nuclear technology to meet its energy needs, First Vice President Parviz Davoudi said in Pakistan on Thursday. REUTERS/Mian Khursheed 

Salman Shah (R), Pakistan's advisor to the Prime Minister on Economic Affairs, and Manouchehr Mottaki (L), Iranian Foreign Minister, sign an agreement on trade and commercial affairs as Iranian Vice President Parviz Davoudi,(2nd L) and Pakistan's Prime Minister Shaukat Aziz, (2nd R) watch, in Islamabad May 25, 2006. Iran has no desire for nuclear weapons but will not compromise on its right to develop nuclear technology to meet its energy needs, First Vice President Parviz Davoudi said in Pakistan on Thursday. REUTERS/Mian Khursheed 

Iranian Vice President Parviz Davoudi (L) holds official talks with Pakistan's Prime Minister Shaukat Aziz (R) in Islamabad May 25, 2006. Iran has no desire for nuclear weapons but will not compromise on its reght to develop nuclear technology to meet its energy needs, First Vice President Parviz Davoudi said in Pakistan on Thursday. REUTERS/Mian Khursheed 

Iran's First Vice President Parviz Davoudi attends the opening ceremony of 11th International Oil, Gas and Petrochemical Exhibition in Tehran April 20, 2006. 

Iran's First Vice President Parviz Davoudi attends the opening ceremony of 11th International Oil, Gas and Petrochemical Exhibition in Tehran April 20, 2006. REUTERS/Raheb Homavandi