1pizzaluvr4u:
Question: how did a small group of people hold over 700 people hostage? regardless of their weapons, something could have been done. Think 9-11 flight that crashed in Shanksville PA
Many of the hostages were old, so that rules them out to tackle the terrorists.
Also, on the plane, I think the people knew that hlep wouldn't be coming for them so they had to do something. With the theatre there was always the chance of intervention.
Even if you do massively outnumber the terrorists, you'd have to attack them at exactly the same time otherwise they'd blow the place up. I think that's why the hostages didn't do anything, the risk was just too big.
