Former CIA employee Edward Snowden has carried out one of the biggest leaks in US history, exposing a top-secret NSA surveillance program to the media.
Leading tech companies were revealed to be involved in intelligence gathering through PRISM spy tool.
Follow the RT interactive map - NSA-world-map-spy. Showing the countries being spied on, those aiding the US in their surveillance operations.
Follow the NSA leak fallout – Snowden Live Updates
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