A Bigger Problem Than ISIS?According to a U.S. Army Corps of Engineers assessment, “Mosul Dam is the most dangerous dam in the world.”Photograph by Victor J. Blue for The New Yorker On the morning of August 7, 2014, a team of fighters from the Islamic State, riding in pickup trucks and purloined American Humvees, swept out of the Iraqi village of Wana and headed for the Mosul Dam. Two months earlier, ISIS had captured Mosul
