Liane was fluent in German and Russian. Together with Otto Gollnow, while her fiancé was severely wounded in the hospital, Berkowitz pasted about 100 adhesive stickers saying : Permanent Exhibition : The Nazi Paradise : War, Hunger, Lies, Gestapo : How much longer? on the evening of 17 May 1942 in the busy area between
Kurfürstendamm and
Uhlandstrasse. This was intended as a protest against
The Soviet Paradise exhibition organised by the
Nazi Party Propaganda Office, that took place at the Berlin
Lustgarten. They also wanted to show that anti-National Socialist resistance in Germany was still active. It is not certain whether during this action Berkowitz and Gollnow were discreetly accompanied and protected by Harro Schulze-Boysen. The stickers were created by
Fritz Thiel and his wife Hannelore who printed stickers using a child's toy rubber stamp kit. ==Arrest==