&lt;p&gt;A protester gestures in front of a burning barricade during a demonstration in Cairo January 28, 2011. Police and demonstrators fought running battles on the streets of Cairo on Friday in a fourth day of unprecedented protests by tens of thousands of Egyptians demanding an end to President Hosni Mubarak&#039;s three-decade rule. REUTERS/Goran Tomasevic&lt;/p&gt;