In March 1968 Palestinian guerrillas and Jordanian troops combined forces to respond to Israeli raids into Jordan, provoking visions of new unity and future military success. Yet by September 1970 mounting friction between the Palestinian guerrillas in Jordan and King Hussein's regime came to a head with the hijackings at Dawson's Field and the defeat by Jordan's forces of the Palestinians. The savagery of the fighting and the bitter consequences for the Palestinian guerrillas gave this month the name Black September: a name that was to reappear ominously in months to come. Who are the...