Spying has a history almost as ancient as humanity itself, but every now and then the rules of the game change. This post-9/11 moment of surveillance is one of those game-changers and the National Security Agency (NSA) has been the deal-breaker and rule-maker. The new rules it brought into existence are simple enough: you — whoever you are and wherever you live on Planet Earth — are a potential target. Get used to it. The most basic ground rule of the new system: no one is exempt from surveillance.