CAIRO — Egypt is working to build the Stiegler’s Gorge dam on the Rufiji River in Tanzania, at a time when the Grand Ethiopian Renaissance Dam (GERD) crisis between Ethiopia and two downstream countries — Egypt and Sudan — reached a turning point. Secretary-General of the League of the Arab States Ahmed Aboul Gheit said in a TV interview June 20 that the next step for Egypt and Sudan is to file a complaint against Ethiopia before…