If you've never heard of Echelon here's an ok introduction. It's produced by the History Channel (histrionics?) so take it with a pinch of salt...
The United States, England, Canada, Australia and New Zealand all have laws that prevent them from spying on their own citizens. But that doesn't mean that other nations can't do this work instead...
ECHELON: THE MOST SECRET SPY SYSTEM reveals the details of the information sharing system developed by these five nations to get around the prohibitions on internal surveillance. Highly placed insiders, including National Security Agency Director Gen. Mike Hayden, Secretary of State Colin Powell and Representative Peter Gross, Chairman of the House Intelligence Committee, talk about how the system works, why it was put in place and the results it has generated, while a different perspective is offered by people like Jim Bamford, the author of Body of Secrets and Wayne Madsen of the Electronic Privacy Information Center
"It's really hard to describe this video with words. It features assaulting visuals, with facts and combined information that you will find in no other documentary, laid over an music score that you wont soon forget. With the intense audio/visuals and loads of information you may need to watch this several times to absorb the many things you've probably never heard of. The information contained in this video applies to all Americans and humans alike, regards of beleifs or affiliations. This is as unbiased as it gets".
When reviewing the material please keep an open mindset but cross-check the details, as inaccuracies may not just exist but are sometimes quite obvious.