A tunnel dug from the West Berlin side at the corner of Bernauer Strasse and Brunnenstrasse is discovered by border troops one day before its completion; it is already 120 metres long.
RIAS report on the discovery of an escape tunnel in East Berlin, 25 February 1971 (in German) (Source: Archiv Deutschlandradio, Broadcast: Rundschau am Abend, Reporter: Helmut Fleischer)
