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They can do that without a warrant, or at least they've been acting like it. The FISA court issues warrants to spy on US individuals if the NSA shows "probable
by teraflop 12y ago
They can do that without a warrant, or at least they've been acting like it. The FISA court issues warrants to spy on US individuals if the NSA shows "probable cause" that they are "agents of a foreign power".