A pro-government militiaman targets a man with his tear gas gun during an opposition rally in front of Friday prayers at Tehran University in Tehran, Iran, Friday, July 17, 2009. The opposition aimed to turn the Friday prayers into a show of their continued strength, despite heavy government suppression, since the disputed June 12 presidential election.
Two opposition demonstrators flash victory signs during a protest in Tehran, Iran, Friday, July 17, 2009. Outside Tehran university, pro-government Basiji militiamen in front of a line of riot police fired tear gas at hundreds of opposition protesters who chanted "death to the dictator" and called on President Mahmoud Ahmadinejad to resign.
An opposition demonstrator kicks a tear gas canister during a protest in front of Friday prayers at Tehran University in Tehran, Iran, Friday, July 17, 2009. Outside the university, pro-government Basiji militiamen in front of a line of riot police fired tear gas at hundreds of opposition protesters who chanted "death to the dictator" and called on President Mahmoud Ahmadinejad to resign.
In this photo released by the semi-official Iranian Students News Agency, Iranian opposition leader Mir Hossein Mousavi, seated at center with the blue shirt, attends Friday prayers at Tehran University campus in Tehran, Iran, Friday, July 17, 2009. Mousavi, who claims to have won the election, sat in the front row of worshippers, attending for the first time since the turmoil began.
A man is assisted after being beaten by anti-riot police at an opposition rally in front of Friday prayers at Tehran University in Tehran, Iran, Friday, July 17, 2009. The opposition aimed to turn the Friday prayers into a show of their continued strength, despite heavy government suppression, since the disputed June 12 presidential election.
A female supporter of the Iranian opposition leader Mir Hossein Mousavi flashes a victory sign while wearing a green ribbon, a symbol of Mousavi's supporters, as she stands amongst female worshippers during Friday prayers in Tehran, Iran, Friday, July 17, 2009.
A female supporter of opposition leader Mir Hossein Mousavi flashes a victory sign while holding a green ribbon, a symbol of Mousavi's supporters, during Friday prayers in Tehran, Iran, Friday, July 17, 2009.
A female supporter of the Iranian opposition leader Mir Hossein Mousavi flashes a victory sign while wearing a green ribbon, a symbol of Mousavi's supporters, during Friday prayers in Tehran, Iran, Friday, July 17, 2009. Another Mousavi supporter holds a poster of a leader of Iran's 1979 Islamic Revolution, Ayatollah Mahmoud Taleghani.