• The Story of Tunnel 29 https://www.bbc.co.uk/news/extra/Od4dL9Lip2/tunnel_29 3 comments 1/11/2019

• The story of Tunnel 29: In 1961, Joachim Rudolph escaped from East Germany. A few months later, he began tunnelling his way back in. https://www.bbc.co.uk/news/extra/od4dl9lip2/tunnel_29 5 comments 1/11/2019 europe