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NSA Spying Row in Congress Ushers in Debate on Managing Big Data

The clash in Congress over limiting U.S. surveillance powers is spurring a broader public debate over managing the billions of e-mails, telephone calls and texts generated globally every day.

Lawmaker efforts yesterday to curb the National Security Agency’s collection of telephone records from companies such as Verizon Communications Inc. marked a step in that larger discussion over the gathering, use and storage of vast amounts of data, say current and former U.S. officials, company representatives and privacy advocates.