En septembre 2001, à Hawaii, l'équipage du porte-avions USS Constellation accueille à son bord de très nombreux passagers civils, dont Maddie, la fille d'un officier. Elle voudrait ainsi profiter de l’occasion pour lui faire comprendre à quel point son engagement dans l’armée lui pèse. Mais l’Histoire avec un grand H la rattrape bien vite quand deux avions s’écrasent contre les tours du World Trade Center et sonnent l’heure de la mobilisation générale...
In the immediate aftermath of the September 11, 2001 attacks, three New Yorkers respond to a new tragedy. June Sickles Fiorilli (JoBeth Williams) lost her firefighter son on 9-11 and now lives with her granddaughter Quinn, not far from the very firehouse that her boy called home. Walter Hartwig (Sean Patrick Flanery) is the lieutenant in charge on the night a jumbo jet crashes on final approach into Kennedy Airport, intertwining him to June and music teacher Catrina Hampton (Melina Kanakaredes), who is awaiting the arrival of her twin sister.
Filmmakers James Hanlon and the Naudet brothers were originally filming Tony Benetatos, a probationary firefighter of the New York City Fire Department assigned to the Engine 7/Ladder 1/Battalion 1 Firehouse on Duane Street in Lower Manhattan with the intention of making a film about the "probie's" first experience as a firefighter. On the morning of September 11, the firehouse, under the direction of Battalion Chief Joseph Pfeifer, was called out on a reported "odor of gas" at Church and Lispenard Streets. Jules rode with Pfeifer to investigate, while Gedeon stayed behind at the firehouse with the "probie.
Admiral McKee (Tom Skerritt) is retired, when following the events of 9/11 he receives a call from the White House informing him that his commander in chief requires him to serve his country once again. Shortly after this he is sworn into office as a senior member of the Office of Homeland Security under Tom Ridge. Once in office Admiral McKee faces the challenge of organising this new office so as to prevent further terrorist attacks against the United States. With this in mind Admiral McKee's wife, Elise Mckee, recommends he speaks to his friend, NSA Agent Sol Binder.
Un travail minutieux de récolte d'images a permis de reconstituer, minute par minute, ce qu'ont vécu les New-Yorkais lors du 11 septembre 2001, entre l'impact du premier avion et l'effondrement de la seconde tour. De leurs appartements, de Times Square aux quais du New Jersey, les New-Yorkais commentent, observent, et surtout filment la catastrophe. Si certains restent incrédules, d'autres sont pris de panique. Les rumeurs circulent, les transports s'arrêtent et les lignes téléphoniques sont mises hors service. L'île de Manhattan se retrouve coupée du monde. Ses habitants cherchent à fuir en marchant le long des routes et prennent d'assaut les ferries.
The miniseries presented a dramatization of the sequence of events leading to the September 11, 2001 attacks by Al Qaeda on the United States, starting from the 1993 World Trade Center bombing and up to the minutes after the collapse of the World Trade Center in 2001. The point of view of the movie is from two primary protagonists: John P. O'Neill, and a composite Central Intelligence Agency (CIA) agent, "Kirk". O'Neill was the real-life Special Agent in charge of Al Qaeda investigations at the Federal Bureau of Investigation. He died in the collapse of the Twin Towers on September 11 shortly after retiring from the Federal Bureau of Investigation (FBI) and taking the position of Director of Security for the World Trade Center. The composite CIA agent "Kirk" is shown dealing with various American allies, especially Northern Alliance leader Ahmed Shah Massoud, in Afghanistan. In addition, "Patricia", a CIA headquarters analyst, represents the views of the rank and file at CIA headquarters. The miniseries features dramatizations of various incidents summarized in the 9/11 Commission Report, and represented in high level discussions held within both the Clinton and Bush administrations. The final hour of the movie dramatizes the events of 9/11, including a re-creation of the second plane entering the World Trade Center, Tom Burnett's calls to his wife, and John Miller's reporting near the scene of the attacks. The film concludes with information about the recommendations of the 9/11 Commission, as well as the performance evaluation the Commission gave the government when it reconvened in 2005.