File photo taken on May 7, 2013 shows Iran`s former nuclear negotiator Hassan Rouhani reacting at a press conference after registration for Iran`s 11th presidential election at the interior ministry in Tehran. Hassan Rouhani defeated his rival conservative candidates in Iran`s 2013 presidential election Saturday by gaining 18,613,329 votes out of counted votes of 36,704,156, accounting for 50.7 percent of all the votes, with a turnout rate of 72.2 percent. (Xinhua/Ahmad Halabisaz)

　　A man holds a poster of Iran`s former nuclear negotiator Hassan Rouhani to celebrate his victory at the presidential election on a street in Tehran, Iran, June 15, 2013. Hassan Rouhani defeated his rival conservative candidates in Iran`s 2013 presidential election Saturday by gaining 18,613,329 votes out of counted votes of 36,704,156, accounting for 50.7 percent of all the votes, with a turnout rate of 72.2 percent. (Xinhua/Ahmad Halabisaz)

　　A man raises a poster of Iran`s former nuclear negotiator Hassan Rouhani to celebrate his victory at the presidential election on a street in Tehran, Iran, June 15, 2013. Hassan Rouhani defeated his rival conservative candidates in Iran`s 2013 presidential election Saturday by gaining 18,613,329 votes out of counted votes of 36,704,156, accounting for 50.7 percent of all the votes, with a turnout rate of 72.2 percent. (Xinhua/Ahmad Halabisaz)