Air traffic controllers tried to contact the pilots but received no response. Other people, however, were contacted by passengers on the plane. An emergency dispatcher southeast of Pittsburgh, Pennsylvania, received a phone call at 9:58 A.M. from a passenger who said he had locked himself in the plane's restroom. The man frantically told the dispatcher that United Airlines Flight 93 was in trouble: "We are being hijacked! We are being hijacked!" Passenger Tom Burnett called his wife, Deena, shortly before 10:00 A.M. and told her his flight had been hijacked. During the next ten or fifteen minutes, Burnett called his wife four times, pumping her for information about the other hijacked airplanes and what had happened to them. She believed that her husband realized before she did that the hijackers did not want a ransom but were intent on a suicide mission. Deena...