In a round-robin narrative, in the style of Jim Dwyer and Kevin Flynn's 102 Minutes, Lynn Spencer takes listeners right to the front lines as the realization hits that multiple hijackings are underway - and then that the country is under attack.

Spencer follows the story all the way through the end of the day, when the fog of war had finally lifted and the country could assess exactly what had happened. The drama unfolds from a variety of perspectives, including the computer screen of the comptroller who first noticed that American flight 11 was off course; the phone call from a stewardess onboard alerting American Airlines that hijackers had killed two flight attendants and entered the cockpit; the battle cab of the military commander who ordered fighter jets in the air; the NASA-like operations floor of the FAA Command Center; and the cockpits of a number of the 4,500 commercial airliners flying over the United States that morning.

Spencer conducted hundreds of interviews and spoke to every key player in the airline industry and military who was involved in the major air events of the day. Based on highly detailed accounts from these interviews, as well as on the voluminous records of radio transmissions, Spencer fills in many holes in the story as it was reported by the 9/11 Commission. She also brings to pulse-quickening life the confusion, the horror, and the fierce determination and quick thinking of so many key players as they improvised their responses to a shocking new type of warfare.