U.S. authorities added both the mother and son to the Terrorist Identities Datamart Environment, or TIDE, database -- a collection of more than a half million names maintained by the National Counterterrorism Center, an intelligence official said.

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Commerce's proposal includes transferring NTIS' paper, microfiche and digital collection and bibliographic database to the Library of Congress.

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The database can be searched by owner, artist, or collection, or a combination of criteria.

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