Riot police throw stones back at protesters opposing Egyptian President Mohamed Mursi during clashes along Qasr Al Nil bridge leading to Tahrir Square in Cairo

Riot police throw stones back at protesters opposing Egyptian President Mohamed Mursi during clashes along Qasr Al Nil bridge leading to Tahrir Square in Cairo January 28, 2013. A man was shot dead on Monday in a fifth day of violence in Egypt that has killed 50 people and prompted the Islamist president to declare a state of emergency in an attempt to end a wave of unrest sweeping the Arab world's biggest nation. REUTERS/Asmaa Waguih (EGYPT - Tags: POLITICS CIVIL UNREST)