The term "CIA annex" typically refers to a facility operated by the Central Intelligence Agency (CIA) that serves as a base for intelligence operations. These annexes are often located in foreign countries and are used for various purposes, including gathering intelligence, conducting covert operations, and providing support to field agents. One notable example is the CIA annex in Benghazi, Libya, which became widely known after the 2012 attack on the U.S. diplomatic mission there. This facility was involved in security and intelligence activities during a time of political instability in the region.