Reply #51: One or two attacks

[John Doe II]

There are two indications that from about 9 :45 the passengers were left alone when the hijacker(s) entered the cockpit to join Jarrah.

About midway through the tape, one of the hijackers said to another “Let te guys in now,” apparently referring to other terrorists entering the cockpit.
(Among the Heroes, p. 291)

It fits that no passenger who was reflecting about their plan of entering the cockpit refers to a hijacker who is still standing in first class. Moreover no sound of a fight with this hijacker is to be heard on any phone call. So I think it’s rather save to assume that from 9:45 the passengers were alone.
A small group around Burnett are in the first class. The rest of the passengers was herded in coach and forms a group around Beamer. Apparently there seems to have been no communication between theses two groups. In not a single phone call theses groups are referring to each other. And Paul Thompson assumes in his timeline that the attack started in first class at 9:57 and was followed by a second attack from coach at 9:58. (Observer, 12/2/01). This chronological order corresponds also to Beamer’s phone call:

Then, in the background, she could hear an “awful commotion,” men’s voices raised and hollering and women screaming “Oh my God,” and “God help us,” and “Help us Jesus.”
Todd seemed to turn away from the phone to speak with someone else.
“You ready?” He said. “Okay. Let’s roll.”
(p. 285f)

So first the attack in first class then following the passengers from coach.
But why didn’t they communicate before if there was nobody preventing them anymore? Repeatedly it’s said that people spoke normally on the phone. So why not talk with passengers from first class?
And why is there no surprise in Beamer’s reaction when he hears that the attack started already?