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In addition to the OFAC list, there exists a
TIDE List , (Terrorist Identities Datamart Environment), for Terrorist Identities Datamart Environment, the list is a storehouse for data about individuals that the intelligence community believes might harm the United States.

Each day, thousands of pieces of intelligence information from around the world -- field reports, captured documents, news from foreign allies and sometimes idle gossip -- arrive in a computer-filled office in McLean.

The watch lists fed by TIDE, used to monitor everyone entering the country or having even a casual encounter with federal, state and local law enforcementr. But they have become a source of irritation -- and potentially more serious consequences -- for many U.S. citizens and visitors.

TIDE is a vacuum cleaner for both proven and unproven information, and its managers disclaim responsibility for how other agencies use the data.