http://rss.nytimes.com/c/34625/f/640350/s/45b99d24/sc/15/l/0L0Snytimes0N0C20A150C0A40C250Cus0Cpolitics0Cvalue0Eof0Ensa0Ewarrantless0Espying0Eis0Edoubted0Ein0Edeclassified0Ereports0Bhtml0Dpartner0Frss0Gemc0Frss/story01.htm

Secrecy surrounding the National Security Agency’s post-9/11 warrantless surveillance and bulk data collection program hampered its effectiveness, the document shows.

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