Iranian opposition supporters chant slogans in support of hardline President Mahmoud Ahmadinejad's main challenger, Mir Hossein Mousavi (portrait), as they protest during a rally marking Quds (Jerusalem) Day in Tehran on September 18, 2009. Riot police, armed with batons, beat protesters who were pelting them with stones at Tehran's key Haft-e Tir Square after the main speeches at the Quds Day rally, witnesses told. Getty Images logo Getty Images 2 months ago

Iranian opposition supporters chant slogans in support of hardline President Mahmoud Ahmadinejad's main challenger, Mir Hossein Mousavi (portrait), as they protest during a rally marking Quds (Jerusalem) Day in Tehran on September 18, 2009. Riot police, armed with batons, beat protesters who were pelting them with stones at Tehran's key Haft-e Tir Square after the main speeches at the Quds Day rally, witnesses told.