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Well the critics question whether that keep everything from everybody is necessary even constitutional.
And some lawmakers ask for more details about how much access the government has to our phone calls and email accounts.
-- -- -- on fox up story live from Washington Kevin what did we learn about that.
-- have on content whether it's email phone calls or text in the NSA needs outside approval for American citizens.
Does the NSA read the emails sent.
American citizens and the same answer man.
Does the MS they -- the -- Messages of American citizen again we do not target the contents of US person communication so that -- specifically.
Weren't anywhere on on the earth.
When it comes to sifting through the phone records of millions of Americans the decision is made internally.
Only twenty analyst at NSA and their two managers for total of 22 people.
Are authorized to approve numbers that may be used to query this database.
And witnesses testifying just under 300 phone numbers were searched in 2012.
But we don't know tonight is whether that's a big jump over previous years and there's more -- these plots right cat.
-- was -- lawmakers were not told today the US intelligence initially missed David Headley who had ties to a Pakistan any terror group.
Had they did the surveillance behind the Mumbai India terror attack in 2011.
They killed or wounded more than 400 people had -- made at least five trips to India to case the Taj hotel in other targets.
-- -- witnesses explain that the takedown of the New York's subway plot or not you will is -- Relied heavily on British intelligence and is monitoring of a suspicious email account.
Still one month maker questioned whether the top secret programs were actually essential in thwarting those so called fifty terror plots.
I really hope -- elucidate for us.
Specifically case by case how many stopped terrorist attacks where those programs to fifteen essential to.
I think if you ask an almost impossible question to say a how important each -- was what I can tell you -- post 9/11.
I don't recognize the FBI came in to 26 years ago.
Our mission is to stop terrorism to prevent it.
-- the number of potential plots in the US Alexander says only ten -- the fifty he cited today how to domestic connection.
He also says that the collection of foreign Internet connect connections.
Communications rather not domestic phone records.
Accounts for most of the intelligence that disrupted those attacks and Katherine and there's.
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