We've all read and heard the nightm...

We've all read and heard the nightmarish details of by what means the heroic firefighters made their way--step by means of step--up the overcrowded and under-designed stairways of the World Trade Center towers upon 9/11, only to make it about half way up when the towers collapsed. Or the disturbing stories of in what way numerous physically disabled occupants were left to wait at elevator lobbies, hoping that in some way someway an elevator cab would get to to their rescue. Those in the elevator industry think there must have been a better way.

In answer to 9/11 and other more-recent fire-related tragedies,