It began with an unsigned email: 'I am a senior member of the intelligence community'. What followed was the most spectacular intelligence breach ever, brought about by one extraordinary man, Edward Snowden. The consequences have shaken the leaders of nations worldwide, from Obama to Cameron, to the presidents of Brazil, France, and Indonesia, and the chancellor of Germany. Edward Snowden, a young computer genius working for America's National Security Agency, blew the whistle on the way th ...