Does the 9/11 report cover the failures on 9/11?

[dansolo]

There is a lot of coverage about the failures leading up to the terrorist attacks on 9/11, but how much has gone into covering the events on the day itself?

How were 19 people on 4 separate flights able to carry knives onto the planes?
Why was the civil air defense protocols not followed?
What really happened to Flight 93?
Who were Saudi nationals that were secretly flown out of the country, and why?