Non-English terms for air defence include the German Flak (Fliegerabwehrkanone, "aircraft defence cannon", also cited as Flugabwehrkanone), whence English flak, and the Russian term Protivovozdushnaya oborona (Cyrillic: ), a literal translation of "anti-air defence", abbreviated as PVO. In Russian the AA systems are called zenitnye (i.e. "pointing to zenith") systems (guns, missiles etc.). In French, air defence is called DCA (Defense contre les aeronefs, "aeronef" being the generic term for all kind of airborne device (airplane, airship, balloon, missile, rocket, etc.)).
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What is air defence called in French?
DCA