The recent leak about the National Security Agency's spying program has put attention on the Federal Intelligence Surveillance Act (FISA) and the courts which oversee the programs. The largely-secret FISA courts began in 1978 but have expanded and changed greatly since then. Melissa Block talks with journalist and author Tim Weiner about the history and process of the FISA court.
FISA Court Has Approved Majority Of Surveillance Warrants
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