Islamic State's Oil Magnates

Since it swept across northern Iraq in early June, capturing towns, refineries, and oil wells along the way, the terrorist group calling itself Islamic State may be making more money than any other terrorist group, according to U.S. intelligence officials and antiterrorism finance experts. While al-Qaeda, Hezbollah, and Hamas depend on the kindness of wealthy sympathizers and state sponsors, Islamic State finances itself almost entirely through revenue from extortion, taxes, and especially illicit oil sales.