The new front in the War on Terror is the "homegrown enemy," domestic terrorists who have become the focus of sprawling counterterrorism structures of policing and surveillance in the United States and across Europe. Domestic surveillance has mushroomed--at least 100,000 Muslims in America have been secretly under scrutiny. British police compiled a secret suspect list of more than 8,000 al-Qaeda "sympathizers," and in another operation included almost 300 children fifteen...