Kudos to National Geographic; it's not easy making a four-hour show so gripping, so entertaining you can't keep your eyes off the screen. That's what they did here, breaking the program into two segments and having a minimum of commercial interruptions.
When it was all over, one had a nice feel of heroes who sacrificed their lives, such as firemen going back in the Twin Towers in order to rescue more trapped people, or the heroes on United Flight 93 who prevented their hijacked plane to crash into the U.S. Capitol building in Washington, or the Pentagon workers whose heroism ranked up with those firemen in New York City.
The most fascinating part, to me, was the first two hours which had a lot of material many people probably don't know: the background of the terrorists and how they got to the day of 9-11-01. Not only how they pulled it off, but the mindset behind their actions - absolutely riveting stuff put "on a clock" giving you a chronological history of this historical tragedy from start to finish.
The Towers disaster pictures, of course, we'll all seen although there might have been a couple of new scenes for some watching this. The worst part are the falling bodies and the descriptions of that from a couple of TV reporters on the street.
There are things in this informative show which make your blood boil, from our side such as an airport security person allowing one of the terrorists through even though the guy had a knife sticking out of his back pocket, which we could see! That, and ineptitude by aviation people monitoring the hijackings, just being clueless about everything.
What I couldn't help though, was being amazed how these terrorists pulled it off, which is detailed in this program. Amazing material. Don't this miss.