Daily Kos: General Hayden: Probable Wha...?:
"QUESTION: Jonathan Landay with Knight Ridder. I'd like to stay on the same issue, and that had to do with the standard by which you use to target your wiretaps. I'm no lawyer, but my understanding is that the Fourth Amendment of the Constitution specifies that you must have probable cause to be able to do a search that does not violate an American's right against unlawful searches and seizures. Do you use --
GEN. HAYDEN: No, actually -- the Fourth Amendment actually protects all of us against unreasonable search and seizure. That's what it says.
QUESTION: But the measure is probable cause, I believe.
GEN. HAYDEN: The amendment says unreasonable search and seizure.
QUESTION: But does it not say probable --
GEN. HAYDEN: No. The amendment says unreasonable search and seizure.. . ."
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.