The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no warrants shall issue, but upon probable cause, supported by oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized.
New York Times Article:
F.B.I. Data Mining Reached Beyond Initial Targets
By ERIC LICHTBLAU
Published: September 9, 2007
WASHINGTON, Sept. 8 — The F.B.I. cast a much wider net in its terrorism investigations than it has previously acknowledged by relying on telecommunications companies to analyze phone-call patterns of the associates of Americans who had come under suspicion, according to newly obtained bureau records.
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Any society that would give up a little liberty to gain a little security will deserve neither and lose both. –