Supporters of Iranian opposition leader Mir-Hossein Mousavi take part in a rally in Tehran, capital of Iran, Sept. 18, 2009, to express their disappointment on the result of the presidential election. [Ahmad Halabisaz/Xinhua]Supporters of Iranian opposition leader Mir-Hossein Mousavi take part in a rally in Tehran, capital of Iran, Sept. 18, 2009, to express their disappointment on the result of the presidential election. [Ahmad Halabisaz/Xinhua]