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Finch: After the attacks, the government gave itself the power to read 

every email, listen to every cell phone, but they needed something that 

could sort through it all, something that could pick the terrorists out of

 the general population before they could act. The public wanted to be 

protected.___1___. ___2___.

Reese: So how do you know it?

Finch: I built it. But there was a problem with this machine. 

I had built it to prevent the next 9/11. ___3___. So I had to teach 

the machine to divide the things it saw into two lists. ___4___. 

Events that would cause massive loss of life were relevant, 

so this would be passed along to the NSA or the FBI. 

Reese: And the irrelevant information?

Finch: ___5___.

They just didn't want to know how they were being protected So when they finally got a system that worked, they kept it secret But it was seeing all sorts of crimes Relevant and irrelevant Every night at midnight, the machine erases it