Squawk,
What exactly are you trying to say? What do you mean by "taken over"? The hijackers are operating the flight controls? Or just holding the pax and crew to ransom?
The resistance by the pax (and crew?) of the aircraft that crashed in Pennsylvania on 9/11 may have been mounted after the hijackers assumed the controls.
Surely in future any crew will do its damnedest to prevent, at all costs, a hijacker from operating the flight controls.
I still believe that, in the case of the two flights that hit the WTC and the flight that crashed into the Pentagon, the crews allowed the hijackers to take control (not sure about the PA flight).
Rockhound