On December 21, 1975, six terrorists from the Revolutionary Cells, forced their way into the conference room of the OPEC headquarters in Vienna and took seventy ministers hostage. A gun battle with the police ensued, and three people were killed. One terrorist was seriously wounded. The terrorists managed to escape to Algiers with a few hostages and the wounded man. There the hostages were released. The wounded terrorist was Hans-Joachim Klein. In “Hans-Joachim Klein: My life as a terrorist” the former terrorist looks back for the first time on the life he has led.