This week, US Secretary of State Mike Pompeo visited Ethiopia, just months before the planned partial opening of a controversial new dam project that Egypt says will harm tens-of-millions living along the River Nile. Construction of the Grand Renaissance Dam in Ethiopia began in 2011 and is expected to start generating electricity within months. But Ethiopia has yet to agree with nearby Egypt how quickly the dam’s reservoir should be filled (the faster the process happens, the less water will flow downstream to Egypt). Attempts by the United States to negotiate a deal between its competing allies in North-Eastern Africa have so far failed, leading to concerns the row could lead to conflict. Ritula Shah and her panel of expert guests assess the economic costs and benefits of the dam to those up and downstream. And as climate change continues to threaten water security in the region, will the dam make the situation better or worse? In the end, who controls the Nile?