Egypt: Cairo protesters stand their ground

Egyptian air force fighter planes buzzed low over Cairo, helicopters hovered above and extra troop trucks appeared in a central square where protesters were demanding an end to President Hosni Mubarak's rule. State television said that a curfew has been imposed in the capital and the military urged the protesters to go home. But the thousands of protesters in Tahrir Square chose to stay on Sunday. The show of defiance came as Egypt entered another turbulent day following a night of deadly unrest.