THE HEROES OF FLIGHT 93 AND HOW THEY HELPED FOIL AN ATTACK ON THE CAPITOL The terrorists used knives and box cutters to commandeer the three airplanes and then crash them into the World Trade Center and the Pentagon. They also indicated that they had bombs. GTE Airphone calls from the hijacked aircraft indicated that the terrorists, who numbered between three and six on each aircraft, would take control of the aircraft by taking a stewardess or passenger and either threatening, or actually cutting or stabbing them, and then take control of the aircraft when the crew came out...