"The Flight That Fought Back."

I'd assume you know about the show thats basically a TV movie about what happened on Flight 93 on 9/11 thats on the Discovery channel.
For those that don't know, Flight 93 was the flight where the passengers fought back and drove the plane into a Pennsylvania field.
But what I'm wondering is, did they make all of the stuff that happened on the plane?
I mean, there were those phone calls people had where they said they'd fight back, but I doubt they said how. For Instance: In the commercial it shows them ramming the cockpit door or something with a flight attendant trolley, i'm assuming they made that up because the phone calls were probably made beforehand.
For those that don't know, Flight 93 was the flight where the passengers fought back and drove the plane into a Pennsylvania field.
But what I'm wondering is, did they make all of the stuff that happened on the plane?
I mean, there were those phone calls people had where they said they'd fight back, but I doubt they said how. For Instance: In the commercial it shows them ramming the cockpit door or something with a flight attendant trolley, i'm assuming they made that up because the phone calls were probably made beforehand.