Simulation-oriented scenarios.- Politics and administration during a 'nuclear-political'crisis.- Comments on 'The Chernobyl disaster and nuclear fallout'.- The Zeebrugge ferry disaster. Elements of a communication and information processes scenario.- Comments on "The Zeebrugge ferry disaster".- Riots without killings. Policy learning in Amsterdam 1980-1985.- Comments on "Riots without killings".- Interactive simulation and crisis management training. New techniques for improving performance.- Comments on "Interactive simulation and crisis management training".- Decision pathways from crisis. A contingency-theory simulation heuristic for the Challenger Shuttle disaster (1983-1988).- Contributors.