Will the civil libertarians please shut up now? If they had had their way, London’s public surveillance cameras would have been unplugged long ago, and the British police would not have quickly identified the 7/7 suicide bombers from their pictures in the King’s Cross and Luton train stations—a breakthrough crucial to tracking down other participants in the plot. The London attacks have exposed the privacy fanatics’ campaign against public cameras as folly; it is just a matter of time before reality crushes other civil libertarian excesses as well, including opposition to data mining and to immigration law enforcement. Few crime-fighting...