To expand the content you provided in a more coherent and complete way, you could consider adding details about the motivations of the four men who hijacked the plane, the reactions of the passengers, the response of the authorities, and the eventual outcome of the situation. This could involve describing the tense moments during the hijacking, the negotiations that took place, any conflicts or resolutions that occurred, and the impact of the incident on both the passengers and the society at large. By elaborating on these aspects, you can create a more detailed and engaging narrative around the hijacking incident in "1993 Air Hijack Operation."