1.   How did the hijackers commandeer four flights in one day?

2.   In the past week, officials have said that the passengers appeared to have stormed the cockpit after the four hijackers commandeered the flight.

3.   Jarrah was one of four men the FBI says commandeered the flight shortly after it departed for San Francisco.

4.   The hijackers never revealed their motive for commandeering the flight from Addis Ababa, Ethiopia, to Nairobi, Kenya.

5.   The hostage crisis began when five ELN guerrillas dressed as businessmen commandeered a flight en route to Bogota from Bucaramanga.