The TSA keeps a database of people who are questioned for acting suspiciously or violating security restrictions. In June, it added names of people who were barred from airplanes for not having IDs.
The agency said this would help track potential terrorists trying to probe airports for weaknesses, but civil liberties advocates say people may face unwarranted scrutiny or questioning.
The TSA now says the passengers' names will not go into the database as long as screeners can determine their identities.
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