Friendship Annex

The Friendship Annex, also known as FANX or FANEX, is facility of the National Security Agency (NSA). It is located near the Baltimore Washington International Airport (BWI) in Linthicum, Maryland. It has been reported that as many as 12,000 NSA personnel are housed in 1000000 sqft of leased space at the Airport Square Technology Park and Industrial Park near BWI. The facility was named after the nearby Friendship International Airport (later renamed Baltimore Washington International Airport).