Friendship Annex

The Friendship Annex, also known as FANX or FANEX, is a National Security Agency (NSA) facility complex located in Linthicum, Maryland, near the Baltimore Washington International Airport (BWI). Established in the 1970s, the complex consists of multiple buildings and serves multiple roles as a cyber espionage station, electronic intelligence processing facility, and NSA Broadcast Network television studio. It is also the primary campus of the National Cryptologic School.