e-mail communications / communications carriers / telephone toll billing records / telephone carriers / bank record access authority / communications service provider customer information / telephone / communications service providers / communications providers / law enforcement investigation / law enforcement / communications provider section / /
Organization
FISA court / Congress / U.S. Court of Appeals / National Security Agency / IG’s Office / US Federal Reserve / national security letter authority / Congressional Research Service / Federal Bureau of Investigation / Department of Justice / District Court for the Southern District of New York / /
Position
attorney / official / President / Attorney General / Specialist / Contacts Author / General / Director of agency w/ employees w/ / t Director / supervisory official of an agency / t Secretary / Inspector General / /
National Security Letters in Foreign Intelligence Investigations: A Glimpse at the Legal Background