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The events of September 11, 2001 are explored from almost every possible angle: the hijackers; the flights; inside the World Trade Center and the Pentagon;  the first responders who risked their lives to save others in an unprecedented emergency; how the President of the United States and top White House officials reacted to the worst attack on American soil since Pearl Harbor. 

It is a story of ordinary people forced to do extraordinary things; of the best of humanity responding to the deeds of the worst; and of people making life or death decisions with incomplete and even inaccurate information.  But most of all, it is fundamentally a story about how one day literally changed everything, a day whose repercussions we are still living through more than two decades later.