Glenn Greenwald, journalist who worked with Edward Snowden, on The Exchange with Amanda Lang

It has been over a year since a man named Edward Snowden unveiled government secrets that would change the world.

Snowden worked as a contractor for the U-S National Security Agency, charged with spying on communications around the world.

He had gathered thousands of secret documents on electronic surveillance, and teamed up with journalist Glenn Greenwald to release them. Here's his conversation on The Exchange with Amanda Lang

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