National Geographic: Inside 9/11 Giuliani's 9/11 (2005– ) watch online HD

On Sept. 11, 2001, New York City's mayor led a city struck by tragedy back from the brink -- from the moment the worst terrorist attacks in U.S. history began. Intimately involved and personally vulnerable, Rudy Giuliani revisits the day he was confronted by the assault on U.S. territory.