
The US government have declassified portions of a 2009 report detailing N.S.A warrantless wiretapping and bulk phone and email surveillance, initiated by George W. Bush after the 9/11 attacks.
The report (embedded below) confirms that former President George W. Bush authorised the N.S.A to snoop on American citizens.
Nytimes.com reports:

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In 2009, the government released a 43-page unclassified version which omitted discussion of many key facts that then remained secret.
In April, the government released an earlier version of this full report.
The newly declassified portions largely consist of references to and descriptions of the text of Mr. Bush’s periodic authorizations to the N.S.A, which evolved over time — especially after a March 2004 confrontation with the Justice Department.
Declassified 9/11 Report:
Savage NYT FOIA Stellarwind IG Report Reprocessed September 2015 Version (Text)