21 Rules For Spies, From A Former NSA Officer

John Schindler, a National Security Agency veteran and now a professor at the Naval War College, tweeted out a series of what he calls Spy Rules today that we consider a must read.

Schindler spent ten years in the NSA as an analyst and counterintelligence officer, and has been outspoken about the Snowden leaks - particularly because he contends that foreign countries as a legitimate form of government.

Here are some of Schindler's spy rules:

Schindler, citing how Snowden ended up in Russia, also believes that "Snowden is very likely an agent of Russian intelligence." His blog can be found here.