Snowden and the three wise NSA whistleblowers

Whistleblowing is a risky business. I expect that, as they planned their course of action over the four months, Edward Snowden and his main media minder, Glenn Greenwald, paid very close attention to what happened to three past whistleblowers who crossed the NSA. And looking at these three men gives an idea of the interests, principles and powers that are being contested beneath the superficially simple tale of a young analyst who fled to Hong Kong to tell the world about runaway US government surveillance.