The 15th May bridge, which spans the river Nile, is seen as the sun sets over Cairo June 12, 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 June 12, 2013. REUTERS/Asmaa Waguih (EGYPT - Tags: POLITICS SOCIETY BUSINESS CITYSCAPE TRANSPORT)

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