Friendship Annex

The Friendship Annex, also known as FANX or FANEX, is a National Security Agency facility complex located in Linthicum, Maryland, near the Baltimore Washington International Airport . 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.

Friendship Annex was established in early 1970 after the NSA outgrew the office space of its headquarters at Fort Meade, Maryland. The agency leased several buildings in the Airport Square Technology Park near BWI, located 20–25 minutes drive time from its headquarters, and named the new facility after the airport, which was at one time named Friendship International Airport. The buildings comprised two seven-story towers and two two-story buildings, labeled FANX I, II, III and IV. One of the two-story buildings was later leased to NASA. The NSA expanded the size of Friendship Annex, completing the complex in the 1990s. Today the complex covers 1,000,000 square feet of leased space and houses an estimated 12,000 NSA personnel. A number of intelligence contractors are also co-located within or near the technology park.

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