On December 21, 1975, six terrorists from the Revolutionary Cells, led by Carlos 'The Jackal' 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. At the moment that Klein arrived in Algiers, he decided to quit terrorism.

Hans-Joachim Klein: My Life as a Terrorist

"Operation OPEC - Terror Attack in Vienna" - On December 21, 1975, six terrorists including the Germans Gabriele Tiedemann and Hans-Joachim Klein, led by Venezuelan top terrorist Carlos, attack the participants of the OPEC conference in Vienna and take eleven oil ministers and dozens of employees hostage. The action kills three people. The lavishly researched film reveals the background of the spectacular attack and establishes connections. The investigators, former hostages and some of the terrorists involved are heard.