An Iranian man holds a picture of supreme leader Ayatollah Ali Khamenei (L) who delivered the Friday prayer speech on June 19, 2009, at Tehran University. Making his first public appearance after daily protests over the official results, Khamenei spoke at the weekly Muslim prayers at the Iranian capital's main university, calling for an end to street protests over last week's disputed presidential election, and siding with declared winner Mahmoud Ahmadinejad.