When terrorists from the Popular Front for the Liberation of Palestine went on a hijacking spree 48 years ago this month, running through the aisles of four international aircraft brandishing guns and grenades, it was one of the most frightening days in the history of air travel. Yet on that day, 5 Elul/September 6,1970, while the terrorists were feeling confident in their invincibility, one pilot was determined that no one was going to take over his craft.