In 1972 the Palestinian terrorist group Black September massacred 11 Israeli athletes at the Olympic Games in Munich. The response by Israel's intelligence agency Mossad was to deploy an assassination squad, targeting senior PLO officials. Masterminded by General Aharon Yariv , the squad claimed at least ten victims, most notably Yasser Arafat 's right-hand man Ali Hassan Salameh. In the second of his investigations into states' responses to terrorism, Peter Taylor follows the trail of revenge that led from Munich to the death of Salameh, and talks to General Yariv about Israel's covert assassination policy. "I approach it from a cost-benefit point of view," says Yariv. "Is it morally acceptable? That's debatable. Is it politically vital? It was."