A view of the Grand Ethiopian Renaissance Dam in Benishangul-Gumuz, Ethiopia, Tuesday. Fireworks lit up the sky the night before the Grand Ethiopian Renaissance Dam (GERD) was officially opened, and dancers dressed as engineers in hardhats performed at the colorful daytime ceremony attended by African dignitaries. The dam is situated on the Blue Nile, a tributary of the Nile, at Ethiopia’s border with another neighbor — Sudan. “Sudan suffers annual floods and has a shortage of electricity, both problems that the Ethiopian Renaissance Dam is able to address for Khartoum,” he said. Attempts at mediation, including by President Trump in 2019 during his first term, have all failed.