August 29, 1972 (, Yam Tze July 21), the two airlines implement prior to boarding line packet inspection.

1972 29, World Airways and American Airlines began its line package before passenger boarding censorship. The two airline officials said, a step that can not only prevent the hijacking incident, also can encourage some travelers to return by plane. The inspection process so that the normal travel time increased by 30 minutes. During the inspection of passengers must be wary of strangers gifts, especially the gift accept Pro before boarding. On August 26, two British women in Pro before boarding accept an Arab acquaintance sent souvenirs. On the plane, when the explosion of this gift, they are wounded.