In February 2013, IS took control of the Tabqa Hydroelectric Dam (Syria), once a showcase in Hafez al-Assad’s development plan and a major electricity source for Aleppo. Earlier this spring, IS opened up dikes around Fallujah to impede the Iraqi army as it tried to besiege the stronghold, causing flooding as far away as Najaf and Baghdad. With its recent advances, IS now controls the hydroelectric dam at Mosul, Iraq’s largest, and IS is poised to take the dam at Haditha, the country’s second largest. With the tables turned, the Iraqi government finds itself considering a preemptive opening of the Haditha floodgates to block IS’s path.