Jon Brodkin writes:
Last month, a letter to Congress noted that “on at least one occasion” a secretive US court ruled that National Security Agency surveillance carried out under a 2008 act of Congress violated the Fourth Amendment’s restriction against unreasonable searches and seizures. But the actual ruling remains secret. Decisions handed down by the US’s Foreign Intelligence Surveillance Court (FISC) are classified “because of the sensitive intelligence matters they concern,” the letter from the Office of the National Intelligence Director to Sen. Ron Wyden (D-OR) states.
The explanation wasn’t good enough for the Electronic Frontier Foundation, which filed a Freedom of Information Act (FOIA) request for details on the FISC ruling or rulings.
Read more on Ars Technica.