The Tangansky Protected Command Point, also known as An-02 (1947), FS-293 (1951), FS-572 (1953), and GO-42 (from 1980), as well as RFQ "Tagan" (and now known as the exhibition complex bunker-42) is a once-secret military complex, bunker, and Spare Long-Range Aviation Command Post (ET-42) in Moscow, Russia, near the underground station of Taganskaya.