Sudanese and Syrian residents demonstrate in solidarity with Syria's anti-government protesters after Friday prayers in Khartoum October 28, 2011. Hundreds of Sudanese Islamists and others staged a rare demonstration in central Khartoum on Friday in solidarity with Syria's anti-government protesters and called for an end to President Bashar al-Assad's crackdown. REUTERS/Mohamed Nureldin Abdallah (SUDAN - Tags: POLITICS CIVIL UNREST)