When it happens on your own doorstep, in very familiar settings like the London "tube" or on a traditional red double-decker bus, right alongside the site of a building where Charles Dickens once lived, terrorism seems very different than it does when innocent people are murdered elsewhere. Britain's first bus bombing took place barely half a mile from the BBC's central London headquarters, and for a day or so after last Thursday's multiple bomb attacks, the BBC, the influential leftist daily the Guardian, and even the British-based global news agency Reuters, all seemed to suddenly discover the words "terrorism" and...