World Trade

Just in time for the movie, a story in Vanity Fair about how NORAD handled the hijackings: 9/11 Live: The NORAD Tapes, by Michael Bronner. Read how NORAD officers and ops crews and traffic controllers handled the reports, starting with reaction to first call about a hijacking out of Boston: "Is this real-world or exercise?"
Scary stuff to be responsible for trying to prevent such a horrific outcome. The tape transcripts are here along with links to the audio, with mind-boggling quotes like this:

"We're just gonna do—we're gonna try to find this guy. They can't find him. There's supposedly been threats to the cockpit. So we're just doing the thing … [off-mic conversation] True. And probably right now with what's going on in the cockpit it's probably really crazy. So, it probably needs to—that will simmer down and we'll probably get some better information."

American 11 slammed into the north tower of the World Trade Center four seconds into this transmission.