The Nile has become a political statement as countries across Africa fight for control of it.
Egypt and Sudan depend on the river for their water.
It is fed by the Blue Nile in Ethiopia.
But the Ethiopian government says it needs to use more of the resource to help its people.
For countries downstream, that is a problem.
Al Jazeera's Mohammed Vall has this report from the source of the Blue Nile in Ethiopia.
