Boarding a vessel on the Nile is to peel back millennia and slow down to river speed as ancient temples, oxcarts and palm trees pass by, unaltered since Pharaohs ruled the roost.

BBC: Journey down the world��s longest rivers

When Mr. Alimi and others reached the Nile that afternoon and sought a way to cross the river, tear gas began to rain down on marchers.

WSJ: A Long March to Seize the Heart of Cairo