I don't know if a helicopter rescue would have been feasible or not. I do know that if I were one of the people trapped at the top of the tower, I would have certainly wanted somebody to TRY. A slim chance of rescue sure looks better than the zero chance these people ended up having. Yes, I know that it would have been risky for the chopper pilots, but they wouldn't have been the only rescuers taking risks that day.
Between this and the report that Port Authority rent-a-cops told people in Tower 2 to head back to their offices, I smell a mega-class-action lawsuit brewing. I'm not saying this is good or bad, just inevitable.
O'Reilly had one of these individuals on, about a week or two later. He asked how could you instruct people to stay?
The response was that it was Standard Procedure.
IMO: What kind of idiot would write a policy that states:
In case of fire, remain calm at your desk.