A man repairs a boat beside the river Nile in Cairo May 22, 2013. Most of Egypt's population live clustered around the Nile valley and delta, and the river is both a vital resource for the country's citizens, and a potent national symbol. In a recent dispute with Ethiopia over the construction of a dam upstream, Egypt's foreign minister Mohamed Kamel Amr underlined the country's reliance on the river's waters: "No Nile - no Egypt," he said. Picture taken May 22, 2013. REUTERS/Asmaa Waguih (EGYPT - Tags: POLITICS SOCIETY BUSINESS)

ATTENTION EDITORS: PICTURE 7 OF 49 FOR PACKAGE 'THE NILE - LIFEBLOOD OF CAIRO'. SEARCH 'NILE LIFEBLOOD' FOR ALL IMAGES