 He obtained copy of the door key to the address "Wergelandsveien 3" (via an imprint in plastilina) together with Roy Nielsen.Nielsen was in charge of the strike towards "Wergelandsveien 3", but the mission was called off because there were people present at the office.Zeiner-Henriksen joined Max Manus, Edvard Tallaksen and Gregers Gram to strike the address "Kirkeveien 90".