Ulrich Pfeifer
civil engineer and tunnel builder
Named in 2 stories, 1962–1971: 2 failed attempts.
7 August 1962
The Betrayed Kiefholzstraße Tunnel
Several escape-helper groups joined forces on a tunnel to a small house on Kiefholzstraße for a planned mass escape, but a Stasi informer among the couriers betrayed it and dozens of would-be refugees were arrested.
February 1971
Tunnel 71 – The Last Tunnel under Bernauer Straße
Hasso Herschel's team lived underground for nine weeks digging a tunnel beneath Bernauer Straße, but came within ten metres of their goal before GDR border troops dug it up.
Named alongside
- Hasso Herschel (2 stories)
- Fritz Wagner (1 story)
- Harry Seidel (1 story)
- Joachim Rudolph (1 story)