The constitutionality of an amended national security wiretapping law has triggered a sharp split at the U.S. Court of Appeals for the Second Circuit.

In a decision that sets up a trip to the U.S. Supreme Court, the Second Circuit by the narrowest of margins voted yesterday to deny hearing en banc a decision recognizing that lawyers, journalists and human rights groups have standing to challenge amendments to the Foreign Intelligence Surveillance Act (FISA) because they fear their conversations are being, or will be, intercepted by the U.S. government.