Within months after the Bush administration relaxed limits on domestic-intelligence gathering in late 2008, the F.B.I. assessed thousands of people and groups in search of evidence that they might be criminals or terrorists, a newly disclosed Justice Department document shows.
In a vast majority of those cases, F.B.I. agents did not find suspicious information that could justify more intensive investigations. The New York Times obtained the data, which the F.B.I. had tried to keep secret, after filing a lawsuit under the Freedom of Information Act.