Today, the terrorist threat looks much different than it did right before 9/11. The U.S. counterterrorism community has dramatically ramped up its intelligence capabilities. Determined to “connect the dots” in the future, the U.S. government created new agencies and instituted a new paradigm for intelligence—share by rule, withhold by exception—and set up a slew of “fusion centers” and joint task forces to foster interagency cooperation. Borders were hardened, cockpit doors reinforced, and watch lists created. In Afghanistan, the United States overthrew the Taliban regime, which was hosting al Qaeda. Today, despite recent Taliban gains, al Qaeda still does not enjoy free rein in the country. In Iraq and Syria, al Qaeda’s offshoot, the Islamic State (or ISIS), is on the run, thanks to the work of a global coalition assembled in 2014 and U.S.-led air strikes and special operations raids. The group’s Iraqi capital of Mosul fell in July, and its Syrian stronghold in Raqqa is almost certain to follow. Owing to the relentless pressure that the United States and its allies have placed on terrorists’ safe havens, the threat of a complex and catastrophic attack emanating from abroad—although not gone—has diminished. At the same time, however, the threat from homegrown and so called lone-wolf terrorism has increased.