A "virtual fence" to defend our border with Mexico? You know, detectors and sensors and cameras and the like, but not a physical barrier? That's the considered policy position of Republican presidential candidate Rudy Giuliani, which he shares with such homeland security experts as Rep. Bennie Thompson, D-Miss., chairman of the House Homeland Security Committee, and Michael Chertoff, secretary of Homeland Security. All of them support a virtual fence -- because any fool can see that walls don't work. Bricks, concrete, barbed wire, all that: overrated! We don't need physical boundaries between us, only virtual boundaries. That's why we'd never...
